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MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

General Description

The MAX220–MAX249 family of line drivers/receivers is intended for all EIA/TIA-232E and V.28/V.24 communications interfaces, particularly applications where ±12V is not available.

The MAX225, MAX233, MAX235, and MAX245/MAX246/ MAX247 use no external components and are recommended for applications where printed circuit board space is critical.The MAX220-MAX249 are offered in 26 different packages with temperatures from 0 to +70°C up to -55°C to +125°C. See ordering information table at the end of the data sheet for all package and temperature options.

Benefits and Features

Saves Board Space

●Integrated Charge Pump Circuitry

•Eliminates the Need for a Bipolar ±12V Supply•Enables Single Supply Operation from +5V Supply●Integrated Capacitors (MAX223, MAX233, MAX235,

MAX245–MAX247)Saves Power for Reduced Power Requirements●5μW Shutdown Mode

Applications

●Interface Translation

●Multidrop RS-232 Networks

●Portable Diagnostics Equipment

Ordering Information and Selection Table appears at end of data sheet.

AutoShutdown and UCSP are trademarks of Integrated Products, Inc.

MAX220/MAX232/MAX232A Pin Configuration and Typical Operating Circuit

+5V INPUTTOP VIEWC3C5C1+1V+2C1-3C2+4C2-5V-6T2OUT7R2IN8+16VCC15GND14T1OUTC1C2MAX220MAX232MAX232A13R1IN12R1OUT11T1IN10T2IN9R2OUTTTL/CMOSINPUTS16VCCC1+V+2+10V+5V TO +10V3C1-VOLTAGE DOUBLER46-10VC2++10V TO -10VV-5C2-VOLTAGE INVERTERC41+5V400kΩ11T1IN+5V400kΩ10T2IN12R1OUTT2OUT7R1IN135kΩ9R2OUTR2IN85kΩGND15RS-232INPUTST1OUT14RS-232OUTPUTSDIP/SOCAPACITANCE (µF)DEVICEC1C2C3C4C5MAX2200.0470.330.330.330.33MAX2321.01.01.01.01.0MAX232A 0.10.10.10.10.1TTL/CMOSOUTPUTS19-4323; Rev 18; 5/19

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

(Voltages referenced to GND.)

VCC..........................................................................-0.3V to +6VV+ (Note 1) ................................................(VCC - 0.3V) to +14VV- (Note 1) .............................................................+0.3V to -14VInput Voltages

TIN .........................................................-0.3V to (VCC - 0.3V) RIN (Except MAX220) .....................................................±30V RIN (MAX220) .................................................................±25V TOUT (Except MAX220) (Note 2) ...................................±15V TOUT (MAX220) ...........................................................±13.2VOutput Voltages

TOUT ...............................................................................±15V ROUT ....................................................-0.3V to (VCC + 0.3V)Driver/Receiver Output Short Circuited to GND ........ContinuousContinuous Power Dissipation (TA = +70°C)

16-Pin Plastic DIP (derate 10.53mW/°C above+70°C) ...842mW 18-Pin Plastic DIP (derate 11.11mW/°C above +70°C)...889mW 20-Pin Plastic DIP (derate 8.00mW/°C above +70°C) ....440mW

Absolute Maximum Ratings—MAX220/222/232A/233A/242/243

16-Pin Narrow SO (derate 8.70mW/°C above +70°C)....696mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C) .......762mW 18-Pin Wide SO (derate 9.52mW/°C above +70°C) .......762mW 20-Pin Wide SO (derate 10.00mW/°C above +70°C) .....800mW 20-Pin SSOP (derate 8.00mW/°C above +70°C) ............640mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C) ......800mW 18-Pin CERDIP (derate 10.53mW/°C above +70°C) ......842mWOperating Temperature Ranges

MAX2_ _AC_ _, MAX2_ _C_ _ ..........................0°C to +70°C MAX2_ _AE_ _, MAX2_ _E_ _ ......................-40°C to +85°C MAX2_ _AM_ _, MAX2_ _M_ _ ...................-55°C to +125°CStorage Temperature Range ............................-65°C to +160°CLead Temperature (soldering, 10s) .................................+300°CSoldering Temperature (reflow)

20 PDIP (P20M+1) ......................................................+225°C All other lead(Pb)-free packages .................................+260°C All other packages containing lead(Pb) .......................+240°C

Note 1: For the MAX220, V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V.Note 2: Input voltage measured with TOUT in high-impedance state, VSHDN or VCC = 0V.

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Electrical Characteristics—MAX220/222/232A/233A/242/243

(VCC = +5V ±10%, C1–C4 = 0.1μF‚ MAX220, C1 = 0.047μF, C2–C4 = 0.33μF, TA = TMIN to TMAX‚ unless otherwise noted.) (Note 3)

PARAMETER

RS-232 TRANSMITTERSOutput Voltage Swing Input Logic-Low VoltageInput Logic-High Voltage

All devices except MAX220 MAX220: VCC = +5.0V

All except MAX220, normal operation

Logic Pullup/lnput Current

VSHDN = 0V, MAX222/MAX242, shutdown, MAX220VCC = +5.5V, VSHDN = 0V, VOUT = ±15V, MAX222/MAX242

VCC = VSHDN = 0V

Data Rate

Transmitter Output Resistance Output Short-Circuit Current RS-232 RECEIVERS

RS-232 Input Voltage Operating Range RS-232 Input Threshold Low RS-232 Input Threshold High

VCC = +5V VCC = +5V

±30

MAX220

All except MAX243 R2INMAX243 R2IN (Note 4) All except MAX243 R2IN MAX243 R2IN (Note 4)

0.8-3

1.8-0.5

2.4-0.1

1.3

±25

VVV

VCC = V+ = V- = 0V, VOUT = ±2V VOUT = 0V

VOUT = 0V MAX220

300±7

VOUT = ±15V

MAX220, VOUT = ±12V

20010M±22

±60

22.4

5±0.01±0.01±0.01

40±1±10±10±25116

kbpsΩmAµAµA

All transmitter outputs loaded with 3kΩ to GND

±5

±81.41.4

0.8

VVV

CONDITIONS

MIN

TYP

MAX

UNITS

Output Leakage Current

Integrated │ 2

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

Electrical Characteristics—MAX220/222/232A/233A/242/243 (continued)

(VCC = +5V ±10%, C1–C4 = 0.1μF‚ MAX220, C1 = 0.047μF, C2–C4 = 0.33μF, TA = TMIN to TMAX‚ unless otherwise noted.) (Note 3)

PARAMETER

CONDITIONS

All except MAX220/MAX243, VCC = +5V, no hysteresis in shutdownMAX220 MAX243

RS-232 Input Resistance TTL/CMOS Output Voltage Low TTL/CMOS Output Voltage High TTL/CMOS Output Short-Circuit Current TTL/CMOS Output Leakage Current EN Input Threshold Low EN Input Threshold High Supply Voltage Range

MAX220

No load

VCC Supply Current (VSHDN = VCC),Figures 5, 6, 11, 19

MAX222/MAX232A/MAX233A/MAX242/MAX243MAX220

MAX222/MAX232A/MAX233A/MAX242/MAX243TA = +25°C

Shutdown Supply Current

MAX222/MAX242

TA = 0°C to +70°CTA = -40°C to +85°CTA = -55°C to +125°C

SHDN Input Leakage Current SHDN Threshold Low SHDN Threshold High

MAX222/MAX242 MAX222/MAX242 MAX222/MAX242

MAX222/MAX232A/CL = 50pF to 2500pF,

RL = 3kΩ to 7kΩ, VCC MAX233/MAX242/MAX243 = +5V, TA = +25°C, measured from +3V to

MAX220-3V or -3V to +3V

MAX222/MAX232A/

MAX233/MAX242/MAX243 MAX220

tPLHT, Figure 1

MAX222/MAX232A/

MAX233/MAX242/MAX243 MAX220

2.06

1.41.412

V/µs

1.5

30.0

TA = +25°C (MAX220) IOUT = 3.2mA

IOUT = 1.6mA (MAX220) IOUT = -1.0mA

Sourcing VOUT = VGND Sinking VOUT = VCC

VSHDN = VCC or VEN = VCC (VSHDN = 0V for MAX222), 0V ≤ VOUT ≤ VCC MAX242 MAX242

2.04.5

0.5412150.12235

105050100±10.8

µAVVµA

3.5-210

VCC -0.2-1030±0.051.41.4

5.5210

±100.8

33MIN0.2

TYP0.50.31550.2

770.40.4

kΩVVmAµAVVV

MAX1.0

VUNITS

RS-232 Input Hysteresis

3kΩ load both inputs

Transition Slew Rate

tPHLT, Figure 1

Transmitter Propagation Delay TLL to RS-232 (Normal Operation)

1.341.55

3.5103.510

µs

Integrated │ 3

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

Electrical Characteristics—MAX220/222/232A/233A/242/243 (continued)

(VCC = +5V ±10%, C1–C4 = 0.1μF‚ MAX220, C1 = 0.047μF, C2–C4 = 0.33μF, TA = TMIN to TMAX‚ unless otherwise noted.) (Note 3)

PARAMETER

tPHLR, Figure 2

Receiver Propagation Delay RS-232 to TLL (Normal Operation)

tPLHR, Figure 2

Receiver Propagation Delay RS-232 to TLL tPHLS, Figure 2(Shutdown)tPHLS, Figure 2Receiver-Output Enable Time Receiver-Output Disable Time Transmitter-Output Enable Time(SHDN Goes High)

Transmitter-Output Disable Time(SHDN Goes Low)

Transmitter + to - Propagation Delay Difference (Normal Operation) Receiver + to - Propagation Delay Difference (Normal Operation)

tER tDRtET tDT

tPHLT - tPLHT

CONDITIONS

MAX222/MAX232A/MAX233/MAX242/MAX243 MAX220

MAX222/MAX232A/MAX233/MAX242/MAX243 MAX220MAX242 MAX242

MAX242, Figure 3MAX242, Figure 3

MAX222/MAX242, 0.1µF caps (includes charge-pump start-up), Figure 4MAX222/MAX242,0.1µF caps, Figure 4MAX222/MAX232A/MAX233/MAX242/MAX243 MAX220

tPHLR - tPLHR

MAX222/MAX232A/MAX233/MAX242/MAX243 MAX220

MIN

TYP0.50.60.60.80.52.5125160250

MAX13131010500500

µsnsnsµsµsUNITS

6003002000100225

Note 3: All units are production tested at hot. Specifications over temperature are guaranteed by design.Note 4: MAX243 R2OUT is guaranteed to be low when R2IN ≥ 0V or is unconnected.

Typical Operating Characteristics

MAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243

OUTPUT VOLTAGE vs. LOAD CURRENT

MAX220-01AVAILABLE OUTPUT CURRENT

vs. DATA RATE

MAX220-02MAX222/MAX242

ON-TIME EXITING SHUTDOWN

1µF CAPSV+V+, V- VOLTAGE (V)+5V+5V0V0V

1µF CAPS0.1µF CAPSV-500ms/div0.1µF CAPSSHDNV+MAX220-031086OUTPUT VOLTAGE (V)420-2-4-6-8-10

EITHER V+ OR V- LOADEDVCC = +5VNO LOAD ONTRANSMITTER OUTPUTS(EXCEPT MAX220, MAX233A)V- LOADED, NO LOAD ON V+0.1µF1µF1110OUTPUT CURRENT (mA)98765

ALL CAPS0.1µFALL CAPS1µFVCC = +5.25VOUTPUT LOAD CURRENTFLOWS FROM V+ TO V-+10V

0.1µF1µFVCC = +4.75VV+ LOADED, NO LOAD ON V-10

LOAD CURRENT (mA)

V-0

-10V

DATA RATE (kb/s)

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

(Voltages referenced to GND.)

VCC..........................................................................-0.3V to +6VV+ ..............................................................(VCC - 0.3V) to +14VV- ...........................................................................+0.3V to -14VInput Voltages

TIN ........................................................-0.3V to (VCC + 0.3V) RIN...................................................................................±30VOutput Voltages

TOUT ...............................................(V+ + 0.3V) to (V- - 0.3V) ROUT ....................................................-0.3V to (VCC + 0.3V)Short-Circuit Duration, TOUT to GND .......................ContinuousContinuous Power Dissipation (TA = +70°C)

14-Pin Plastic DIP (derate 10.00mW/°C above +70°C) ...800mW 16-Pin Plastic DIP (derate 10.53mW/°C above +70°C) ...842mW 20-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW 24-Pin Narrow Plastic DIP

(derate 13.33mW/°C above +70°C) ..............................1.07W 24-Pin Plastic DIP (derate 9.09mW/°C above +70°C) 500mW16-Pin Wide SO (derate 9.52mW/°C above +70°C) ...762mW 20-Pin Wide SO (derate 10.00mW/°C above +70°C) .800mW24-Pin Wide SO (derate 11.76mW/°C above +70°C)..941mW

Absolute Maximum Ratings—MAX223/MAX230–MAX241

28-Pin Wide SO (derate 12.50mW/°C above +70°C) ........1W 44-Pin Plastic FP (derate 11.11mW/°C above +70°C) 889mW14-Pin CERDIP (derate 9.09mW/°C above +70°C) ....727mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C) ..800mW20-Pin CERDIP (derate 11.11mW/°C above +70°C) ...889mW 24-Pin Narrow CERDIP

(derate 12.50mW/°C above +70°C) ...................................1W 24-Pin Sidebraze (derate 20.0mW/°C above +70°C) ........1.6W 28-Pin SSOP (derate 9.52mW/°C above +70°C) .............762mWOperating Temperature Ranges

MAX2 _ _ C _ _ ..................................................0°C to +70°C MAX2 _ _ E _ _ ..............................................-40°C to +85°C MAX2 _ _ M _ _ ...........................................-55°C to +125°CStorage Temperature Range ............................-65°C to +160°CLead Temperature (soldering, 10s) .................................+300°CSoldering Temperature (reflow)

20 PDIP (P20M+1) ......................................................+225°C 24 PDIP (P24M-1) .......................................................+225°C All other lead(Pb)-free packages .................................+260°C All other packages containing lead(Pb) .......................+240°C

Electrical Characteristics—MAX223/MAX230–MAX241

(MAX223/230/232/234/236/237/238/240/241, VCC = +5V ±10%; MAX233/MAX235, VCC = +5V ±5%‚ C1–C4 = 1.0μF; MAX231/MAX239, VCC = +5V ±10%; V+ = +7.5V to +13.2V; TA = TMIN to TMAX; unless otherwise noted.) (Note 5)

PARAMETEROutput Voltage SwingVCC Supply Current

CONDITIONS

All transmitter outputs loaded with 3kΩ to groundNo load,TA = +25°C

MAX232/233

MAX223/230/234–238/240/241MAX231/239MAX231MAX239

TA = +25°C

MAX223

MAX230/235/236/240/241

2.02.4

1.5

-30

200+30

VµAV

MIN±5.0

TYP±7.3570.41.85151

1015151550100.8

mAµAVmA

MAX

UNITSV

V+ Supply CurrentShutdown Supply CurrentInput Logic-Low VoltageInput Logic-High VoltageLogic Pullup CurrentReceiver Input VoltageOperating Range

TIN, EN, SHDN (MAX233); EN, SHDN (MAX230/235–241)TIN

EN, SHDN (MAX223);

EN, SHDN (MAX230/235/236/240/241)VTIN = 0V

Integrated │ 5

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

Electrical Characteristics—MAX223/MAX230–MAX241 (continued)

PARAMETER

CONDITIONS

Normal operation

VSHDN = +5V (MAX223)

VSHDN = 0V (MAX235/236/240/241)Shutdown (MAX223) VSHDN = 0V,

VEN = +5V (R4IN, R5IN)

Normal operation

VSHDN = 5V (MAX223)

VSHDN = 0V (MAX235/236/240/241)Shutdown (MAX223) VSHDN = 0V,

VEN = +5V (R4IN‚ R5IN)

0.23MIN0.8

TYP1.2

0.6

1.5

MAX

UNITS

RS-232 Input Logic-Low Voltage

TA = +25°C,VCC = +5V

1.72.4

RS-232 Input Logic-High Voltage

TA = +25°C,VCC = +5V

1.50.55VCC -0.4±0.056004009002500.5

2.41.070.4

VkΩVV

±10

µAnsns

10404030

V/μsµs

RS-232 Input HysteresisRS-232 Input ResistanceTTL/CMOS Output Voltage LowTTL/CMOS Output Voltage HighTTL/CMOS Output Leakage Current

Receiver Output Enable TimeReceiver Output Disable Time

VCC = +5V, no hysteresis in shutdownTA = +25°C, VCC = +5V

IOUT = 1.6mA (MAX231/232/233, IOUT = 3.2mA)IOUT = -1mA

0V ≤ ROUT ≤ VCC; VEN = 0V (MAX223);VEN = VCC (MAX235–241)NormaloperationNormaloperationRS-232 IN toTTL/CMOS OUT,CL = 150pF

MAX223

MAX235/236/239/240/241MAX223

MAX235/236/239/240/241Normal operationVSHDN = 0V(MAX223)

tPHLStPLHS3.5

Propagation Delay46

5.1

Transition Region Slew Rate

MAX223/MAX230/MAX234–241, TA = +25°C, VCC = +5V,RL = 3kΩ to 7kΩ‚ CL = 50pF to 2500pF, measured from+3V to -3V or -3V to +3V

MAX231/MAX232/MAX233, TA = +25°C, VCC = +5V,RL = 3kΩ to 7kΩ, CL = 50pF to 2500pF, measured from+3V to -3V or -3V to +3VVCC = V+ = V- = 0V, VOUT = ±2V

300

±10

ΩmA

Transmitter Output ResistanceTransmitter Output Short-CircuitCurrent

Note 5: All units are production tested at hot except for the MAX240, which is production tested at TA = +25°C. Specifications over

temperature are guaranteed by design.

Integrated │ 6

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

Typical Operating Characteristics

MAX223/MAX230–MAX241

TRANSMITTER OUTPUTVOLTAGE (VOH) vs. VCC

MAX220-042 TRANSMITTERSLOADED8.0VOH (V)1 TRANSMITTERLOADEDMAX220-057.47.27.0VOH (V)6.86.66.46.26.0

160kb/s80kb/s20kb/sTA = +25°CVCC = +5V3 TRANSMITTERS LOADEDRL = 3kΩC1–C4 = 1µF0

500

1000

1500

2000

11.0SLEW RATE (V/µs)10.09.08.07.06.05.04.0

1 TRANSMITTER LOADEDTA = +25°CVCC = +5VLOADED, RL = 3kΩC1–C4 = 1µF2 TRANSMITTERS LOADED7.5

7.0

6.5

3 TRANS-MITTERSLOADEDTA = +25°CC1–C4 = 1µFTRANSMITTER4 TRANSMITTERSLOADS =LOADED3kΩ || 2500pF5.0VCC (V)

5.5

3 TRANSMITTERS LOADED4 TRANSMITTERS LOADED500

1000

1500

2000

2500

4.5

2500

LOAD CAPACITANCE (pF)

TRANSMITTER OUTPUTVOLTAGE (VOL) vs. VCC

MAX220-07-6.5-7.0VOL (V)-7.5-8.0-8.5-9.0

1 TRANS-MITTERLOADED2 TRANS-MITTERSLOADED4.5

4 TRANS-MITTERSLOADEDTA = +25°CC1–C4 = 1µFTRANSMITTERLOADS =3kΩ || 2500pFMAX220-08-6.0-6.2-6.4VOL (V)-6.6-6.8-7.0

TA = +25°CVCC = +5V3 TRANSMITTERS LOADEDRL = 3kΩC1–C4 = 1µF160kb/s80kb/s20kb/s864V+, V- (V)20-2-4-6-8-10

ALL TRANSMITTERS UNLOADED0

TA = +25°CVCC = +5VC1–C4 = 1µFV- LOADED,V+ AND V-NO LOADEQUALLYON V+LOADEDV+ LOADED,NO LOADON V-3 TRANS-MITTERSLOADED5.0VCC (V)

5.5

-7.2-7.4-7.6

500

1000

1500

2000

2500

101520253035404550

CURRENT (mA)

LOAD CAPACITANCE (pF)

V+, V- WHEN EXITING SHUTDOWN

(1µF CAPACITORS)

MAX220-13

V+

OV-

VSHDN*

500ms/div

*SHUTDOWN POLARITY IS REVERSED FOR NON MAX241 PARTS

Integrated │ 7

MAX220-09-6.0

TRANSMITTER OUTPUT VOLTAGE (VOL)

vs. LOAD CAPACITANCE ATDIFFERENT DATA RATES

TRANSMITTER OUTPUT VOLTAGE (V+, V-)

vs. LOAD CURRENT

MAX220-068.5

TRANSMITTER OUTPUT VOLTAGE (VOH)

vs. LOAD CAPACITANCE ATDIFFERENT DATA RATES

TRANSMITTER SLEW RATEvs. LOAD CAPACITANCE

12.0

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

(Voltages referenced to GND.)

Supply Voltage (VCC) ..............................................-0.3V to +6VInput Voltages

TIN‚ ENA, ENB, ENR, ENT, ENRA,

ENRB, ENTA, ENTB.............................-0.3V to (VCC + 0.3V) RIN...................................................................................±25V TOUT (Note 6) .................................................................±15V ROUT ....................................................-0.3V to (VCC + 0.3V)Short Circuit Duration (one output at a time)

TOUT to GND ........................................................Continuous ROUT to GND .......................................................Continuous

Absolute Maximum Ratings—MAX225/MAX244–MAX249

Continuous Power Dissipation (TA = +70°C)

28-Pin Wide SO (derate 12.50mW/°C above +70°C) ........1W 40-Pin Plastic DIP (derate 11.11mW/°C above +70°C) 611mW44-Pin PLCC (derate 13.33mW/°C above +70°C) ........1.07WOperating Temperature Ranges

MAX225C_ _, MAX24_C_ _ ...............................0°C to +70°C MAX225E_ _, MAX24_E_ _ ..........................-40°C to +85°CStorage Temperature Range ............................-65°C to +160°CLead Temperature (soldering,10s)) .................................+300°CSoldering Temperature (reflow)

40 PDIP (P40M-2) .......................................................+225°C All other lead(Pb)-free packages .................................+260°C All other packages containing lead(Pb) .......................+240°C

Note 6: Input voltage measured with transmitter output in a high-impedance state, shutdown, or VCC = 0V.

Electrical Characteristics—MAX225/MAX244–MAX249

(MAX225, VCC = +5.0V ±5%; MAX244–MAX249, VCC = +5.0V ±10%, external capacitors C1–C4 = 1μF; TA = TMIN to TMAX; unless otherwise noted.) (Note 7)

PARAMETER

RS-232 TRANSMITTERSInput Logic-Low VoltageInput Logic-High VoltageLogic Pullup/lnput CurrentData Rate

Output Voltage Swing

Output Leakage Current (Shutdown)Transmitter Output ResistanceOutput Short-Circuit CurrentRS-232 RECEIVERS

RS-232 Input Voltage Operating RangeRS-232 Input Logic-Low VoltageRS-232 Input Logic-High VoltageRS-232 Input HysteresisRS-232 Input ResistanceTTL/CMOS Output Voltage LowTTL/CMOS Output Voltage HighTTL/CMOS Output Short-Circuit CurrentTTL/CMOS Output Leakage Current

IOUT = 3.2mAIOUT = -1.0mA

Sourcing VOUT = VGNDSinking VOUT = VCC

Normal operation, outputs disabled,

Tables 1a–1d, 0V ≤ VOUT ≤ VCC, VENR_ = VCC

3.5-210

VCC = +5VVCC = +5VVCC = +5V

0.230.8

1.31.80.550.2VCC - 0.2-1030±0.05

±0.102.41.070.4±25

VVVVkΩVVmAμA

Tables 1a–1d

Normal operationShutdown

±52

1.41.410±0.01120±7.5±0.01±0.01

300±7

10M±30

±25±25

ΩmA

50±1640.8

VVμAkbpsVμA

CONDITIONS

MIN

TYP

MAX

UNITS

Tables 1a–1d, normal operation

All transmitter outputs loaded with 3kΩ to GNDTables 1a–1d

VENA, VENB, VENT, VENTA,VENTB = VCC, VOUT = ±15VVCC = 0V, VOUT = ±15V

VCC = V+ = V- = 0V, VOUT = ±2V (Note 8)VOUT = 0V

Integrated │ 8

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

Electrical Characteristics—MAX225/MAX244–MAX249 (continued)

(MAX225, VCC = +5.0V ±5%; MAX244–MAX249, VCC = +5.0V ±10%, external capacitors C1–C4 = 1μF; TA = TMIN to TMAX; unless otherwise noted.) (Note 7)

PARAMETER

POWER SUPPLY AND CONTROL LOGICSupply Voltage Range

No load3kΩ loads onall outputsTA = +25°CTA = TMIN to TMAXLeakage current

Control Input

AC CHARACTERISTICSTransition Slew Rate

Transmitter Propagation DelayTLL to RS-232 (Normal Operation)Receiver Propagation Delay

TLL to RS-232 (Normal Operation)Receiver Propagation Delay

TLL to RS-232 (Low-Power Mode)Transmitter + to - Propagation

Delay Difference (Normal Operation)Receiver + to - Propagation

Delay Difference (Normal Operation)Receiver-Output Enable TimeReceiver-Output Disable Time

CL = 50pF to 2500pF, RL = 3kΩ to 7kΩ, VCC = +5V,TA = +25°C, measured from +3V to -3V or -3V to +3VtPHLT, Figure 1tPLHT, Figure 1tPHLR, Figure 2tPLHR, Figure 2tPHLS, Figure 2tPLHS, Figure 2tPHLT - tPLHTtPHLR - tPLHRtER, Figure 3tDR, Figure 3tET

tDT, Figure 4

MAX246–MAX249

(excludes charge-pump startup)MAX225/MAX245–MAX249(includes charge-pump startup)

101.31.30.60.60.60.6350350100100510100

500500303.53.51.51.51.510

V/μsµsµsµsnsnsnsnsµsmsns

Logic-low voltageLogic-high voltage

2.4

1.41.4

MAX225

MAX244–MAX249MAX225

MAX244–MAX249

4.754.5

101140578

2550±10.8

µAV

5.255.52030

mAV

CONDITIONS

MIN

TYP

MAX

UNITS

VCC Supply Current(Normal Operation)

Shutdown Supply Current

Transmitter Enable Time

Transmitter Disable Time

Note 7: All units production tested at hot. Specifications over temperature are guaranteed by design.

Note 8: The 300Ω minimum specification complies with EIA/TIA-232E, but the actual resistance when in shutdown mode or VCC =

0V is 10MΩ as is implied by the leakage specification.

Integrated │ 9

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

Typical Operating Characteristics

MAX225/MAX244–MAX249

TRANSMITTER SLEW RATEvs. LOAD CAPACITANCE

MAX220-10OUTPUT VOLTAGE

vs. LOAD CURRENT FOR V+ AND V-MAX220-11TRANSMITTER OUTPUT VOLTAGE (V+, V-)

vs. LOAD CAPACITANCE ATDIFFERENT DATA RATES

8.58.0V+, V- (V)7.57.06.56.05.5

200kb/sALL CAPACITIORS 1µF0

LOAD CAPACITANCE (nF)

100kb/sVCC = +5V WITH ALL TRANSMITTERS DRIVENLOADED WITH 5kΩ10kb/s20kb/s40kb/s60kb/sMAX220-1218TRANSMITTER SLEW RATE (V/µs)161412108642

4VCC = +5V1086OUTPUT VOLTAGE (V)420-2-4-6-8-10

V+ AND V- LOADEDV+ LOADED0

V+ AND V- LOADEDVCC = +5VEXTERNAL CHARGE PUMP1µF CAPACITORS 8 TRANSMITTERSDRIVING 5kΩ AND2000pF AT 20kb/sEITHER V+ OR V- LOADED9.0

EXTERNAL POWER SUPPLY1µF CAPACITORS 40kb/s DATA RATE 8 TRANSMITTERSLOADED WITH 3kΩV- LOADED535

5.0

LOAD CAPACITANCE (nF)LOAD CURRENT (mA)

Integrated │ 10

MAX220–MAX249

Test Circuits/Timing Diagrams

+3VINPUT0VV+OUTPUT0VV-tPLHTtPHLTFigure 1. Transmitter Propagation-Delay TimingENRX INRRX OUT1kΩXVCC - 2Va) TEST CIRCUIT150pFEN INPUT+3V0VENOUTPUT ENABLE TIME (tER)+3.5VRECEIVEROUTPUTS+0.8Vb) ENABLE TIMING+3VENEN INPUT0VOUTPUT DISABLE TIME (tDR)VOHVOH - 0.5VRECEIVEROUTPUTSVCC - 2VVVOLOL + 0.5Vc) DISABLE TIMINGFigure 3. Receiver-Output Enable and Disable Timing+5V-Powered, MultichannelRS-232 Drivers/Receivers

+3VINPUT0V*50%50%OUTPUTV50%50%CCGNDtPHLRttPHLStPLHRPLHS*EXCEPT FOR R2 ON THE MAX243WHERE -3V IS USED.Figure 2. Receiver Propagation-Delay Timing

SHDN+3V0VOUTPUT DISABLE TIME (tDT)V++5V0V-5VV-a) TIMING DIAGRAM1 OR 0TX3kΩ50pFb) TEST CIRCUITFigure 4. Transmitter-Output Disable Timing

Integrated │ 11

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

Control Pin Configuration Tables

Table 1a. MAX245 Control Pin Configurations

ENT0011

ENR0101

OPERATION STATUSNormal OperationNormal OperationShutdownShutdown

TRANSMITTERS

All ActiveAll ActiveAll High-ZAll High-Z

All ActiveAll High-Z

All Low-Power Receive ModeAll High-Z

RECEIVERS

Table 1b. MAX245 Control Pin Configurations

ENT001

ENR010

OPERATION STATUSNormal OperationNormal OperationShutdown

TRANSMITTERS

TA1–TA4All ActiveAll ActiveAll High-Z

TB1–TB4All ActiveAll ActiveAll High-Z

All ActiveRA1–RA4 High-Z,RA5 ActiveAll Low-PowerReceive ModeRA1–RA4 High-Z,RA5 Low-PowerReceive Mode

RECEIVERS

RA1–RA5

RB1–RB5All ActiveRA1–RA4 High-Z,RA5 ActiveAll Low-PowerReceive ModeRA1–RA4 High-Z,RA5 Low-PowerReceive Mode

11ShutdownAll High-ZAll High-Z

Table 1c. MAX246 Control Pin Configurations

ENA001

ENB010

OPERATION STATUSNormal OperationNormal OperationShutdown

TRANSMITTERS

TA1–TA4All ActiveAll ActiveAll High-Z

TB1–TB4All ActiveAll ActiveAll High-Z

All ActiveAll ActiveRA1–RA4 High-Z,RA5 ActiveRA1–RA4 High-Z,RA5 Low-PowerReceive Mode

RECEIVERS

RA1–RA5

RB1–RB5All ActiveRA1–RA4 High-Z,RA5 ActiveAll Low-PowerReceive ModeRA1–RA4 High-Z,RA5 Low-PowerReceive Mode

11ShutdownAll High-ZAll High-Z

Integrated │ 12

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

Table 1d. MAX247/MAX248/MAX249 Control Pin Configurations

TRANSMITTERSENTAENTBENRAENRBOPERATION STATUSNormal OperationNormal OperationNormal OperationNormal OperationNormal OperationNormal OperationNormal OperationNormal OperationNormal OperationNormal OperationNormal OperationNormal OperationMAX247MAX248MAX249000000001111000011110000001100110011010101010101TA1–TA4TA1–TA4TA1–TA3All ActiveAll ActiveAll ActiveAll ActiveAll ActiveAll ActiveAll ActiveAll ActiveAll High-ZAll High-ZAll High-ZAll High-ZTB1–TB4TB1–TB4TB1–TB3All ActiveAll ActiveAll ActiveAll ActiveAll High-ZAll High-ZAll High-ZAll High-ZAll ActiveAll ActiveAll ActiveAll ActiveRA1–RA4RA1–RA4RA1–RA5All ActiveAll ActiveAll High-ZAll High-ZAll ActiveAll ActiveAll High-ZAll High-ZAll ActiveAll ActiveAll High-ZAll High-ZLow-PowerReceive ModeLow-PowerReceive ModeAll High-ZRECEIVERSRB1–RB5RB1–RB4RB1–RB5All ActiveAll High-Z, exceptRB5 stays active onMAX247All ActiveAll High-Z, exceptRB5 stays active onMAX247All ActiveAll High-Z, exceptRB5 stays active onMAX247All ActiveAll High-Z, exceptRB5 stays active onMAX247All ActiveAll High-Z, exceptRB5 stays active onMAX247All ActiveAll High-Z, exceptRB5 stays active onMAX247Low-PowerReceive ModeAll High-Z, exceptRB5 stays active onMAX247Low-PowerReceive ModeAll High-Z, exceptRB5 stays active onMAX2471100ShutdownAll High-ZAll High-Z1101ShutdownAll High-ZAll High-Z1110ShutdownAll High-ZAll High-Z1111ShutdownAll High-ZAll High-ZAll High-Z Integrated │ 13

MAX220–MAX249

Detailed Description

The MAX220–MAX249 contain four sections: dual charge-pump DC-DC voltage converters, RS-232 drivers, RS-232 receivers, and receiver and transmitter enable control inputs.

Dual Charge-Pump Voltage Converter

The MAX220–MAX249 have two internal charge-pumps that convert +5V to ±10V (unloaded) for RS-232 driver operation. The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the V+ output. The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V- output.

A small amount of power may be drawn from the +10V (V+) and -10V (V-) outputs to power external circuitry (see the Typical Operating Characteristics section), except on the MAX225 and MAX245–MAX247, where these pins are not available. V+ and V- are not regulated, so the output voltage drops with increasing load current. Do not load V+ and V- to a point that violates the minimum ±5V EIA/TIA-232E driver output voltage when sourcing current from V+ and V- to external circuitry.

When using the shutdown feature in the MAX222, MAX225, MAX230, MAX235, MAX236, MAX240, MAX241, and MAX245–MAX249, avoid using V+ and Vto power external circuitry. When these parts are shut down, V-falls to 0V, and V+ falls to +5V. For applications wherea +10V external supply is applied to the V+ pin (instead ofusing the internal charge pump to generate +10V), the C1capacitor must not be installed and the SHDN pin must beconnected to VCC. This is because V+ is internally con-nected to VCC in shutdown mode.

RS-232 Drivers

The typical driver output voltage swing is ±8V when load-ed with a nominal 5kΩ RS-232 receiver and VOutput swing is guaranteed to meet the EIA/TIA-232E CC = +5V. and V.28 specification, which calls for ±5V minimum driver output levels under worst-case conditions. These include a minimum 3kΩ load, Vating temperature. Unloaded driver output voltage ranges CC = +4.5V, and maximum oper-from (V+ -1.3V) to (V- +0.5V).

Input thresholds are both TTL and CMOS compatible. The inputs of unused drivers can be left unconnected since 400kΩ input pullup resistors to VCC are built in (except for the MAX220). The pullup resistors force the outputs of unused drivers low because all drivers invert. The internal input pullup resistors typically source 12μA, except in shutdown mode where the pullups are disabled. Driver outputs turn off and enter a high-impedance state—where

+5V-Powered, MultichannelRS-232 Drivers/Receivers

leakage current is typically microamperes (maximum 25μA)—when in shutdown mode, in three-state mode, or when device power is removed. Outputs can be driven to ±15V. The powersupply current typically drops to 8μA in shutdown mode. The MAX220 does not have pullup resistors to force the outputs of the unused drivers low. Connect unused inputs to GND or VCC.

The MAX239 has a receiver three-state control line, and the MAX223, MAX225, MAX235, MAX236, MAX240, and MAX241 have both a receiver three-state control line and a low-power shutdown control. Table 2 shows the effects of the shutdown control and receiver three-state control on the receiver outputs.

The receiver TTL/CMOS outputs are in a high-imped-ance, three-state mode whenever the three-state enable line is high (for the MAX225/MAX235/MAX236/MAX239–MAX241), and are also high-impedance whenever the shutdown control line is high.

When in low-power shutdown mode, the driver outputs are turned off and their leakage current is less than 1μA with the driver output pulled to ground. The driver output leakage remains less than 1μA, even if the transmitter output is backdriven between 0V and (VCC + 6V). Below -0.5V, the transmitter is diode clamped to ground with1kΩ series impedance. The transmitter is also zenerclamped to approximately Vance of 1kΩ.

CC + 6V, with a series imped-The driver output slew rate is limited to less than 30V/μs as required by the EIA/TIA-232E and V.28 specifica-tions. Typical slew rates are 24V/μs unloaded and 10V/μs loaded with 3Ω and 2500pF.

RS-232 Receivers

EIA/TIA-232E and V.28 specifications define a voltage level greater than 3V as a logic 0, so all receivers invert. Input thresholds are set at 0.8V and 2.4V, so receivers respond to TTL level inputs as well as EIA/TIA-232E and V.28 levels.

Table 2. Three-State Control of Receivers

PARTSHDNSHDNENEN(R)RECEIVERSLowXHigh ImpedanceMAX223

—

HighLow—Active

HighHighHigh ImpedanceMAX225———LowHigh ImpedanceHighActive

MAX235LowLowHigh ImpedanceMAX236Low—

—

HighActive

MAX240

High

High Impedance

Integrated │ 14

MAX220–MAX249

The receiver inputs withstand an input overvoltage up to ±25V and provide input terminating resistors with nominal 5kΩ values. The receivers implement Type 1 interpreta-tion of the fault conditions of V.28 and EIA/TIA-232E.The receiver input hysteresis is typically 0.5V with a guaranteed minimum of 0.2V. This produces clear out-put transitions with slow-moving input signals, even with moderate amounts of noise and ringing. The receiver propagation delay is typically 600ns and is independent of input swing direction.

Low-Power Receive Mode

The low-power receive mode feature of the MAX223, MAX242, and MAX245–MAX249 puts the IC into shut-down mode but still allows it to receive information. This is important for applications where systems are periodically awakened to look for activity. Using low-power receive mode, the system can still receive a signal that will acti-vate it on command and prepare it for communication at faster data rates. This operation conserves system power.

Negative Threshold—MAX243

The MAX243 is pin compatible with the MAX232A, differ-ing only in that RS-232 cable fault protection is removed on one of the two receiver inputs. This means that con-trol lines such as CTS and RTS can either be driven or left unconnected without interrupting communication. Different cables are not needed to interface with different pieces of equipment.

The input threshold of the receiver without cable fault protection is -0.8V rather than +1.4V. Its output goes positive only if the input is connected to a control line that is actively driven negative. If not driven, it defaults to the 0 or “OK to send” state. Normally‚ the MAX243’s other receiver (+1.4V threshold) is used for the data line (TD or RD)‚ while the negative threshold receiver is connected to the control line (DTR‚ DTS‚ CTS‚ RTS, etc.).

Other members of the RS-232 family implement the optional cable fault protection as specified by EIA/TIA-232E specifications. This means a receiver output goes high whenever its input is driven negative‚ left uncon-nected‚ or shorted to ground. The high output tells the serial communications IC to stop sending data. To avoid this‚ the control lines must either be driven or connected with jumpers to an appropriate positive voltage level.

+5V-Powered, MultichannelRS-232 Drivers/Receivers

Shutdown—MAX222–MAX242

On the MAX222‚ MAX235‚ MAX236‚ MAX240‚ and MAX241‚ all receivers are disabled during shutdown. On the MAX223 and MAX242‚ two receivers continue to operate in a reduced power mode when the chip is in shutdown. Under these conditions‚ the propagation delay increases to about 2.5μs for a high-to-low input transition. When in shutdown, the receiver acts as a CMOS inverter with no hysteresis. The MAX223 and MAX242 also have a receiver output enable input (EN for the MAX242 and EN for the MAX223) that allows receiver output control independent of SHDN (SHDN for MAX241). With all other devices‚ SHDN (SHDN for MAX241) also disables the receiver outputs.

The MAX225 provides five transmitters and five receiv-ers‚ while the MAX245 provides ten receivers and eight transmitters. Both devices have separate receiver and transmitter-enable controls. The charge pumps turn off and the devices shut down when a logic high is applied to the ENT input. In this state, the supply current drops to less than 25μA and the receivers continue to operate in a low-power receive mode. Driver outputs enter a high-impedance state (three-state mode). On the MAX225‚ all five receivers are controlled by the ENR input. On the MAX245‚ eight of the receiver outputs are controlled by the ENR input‚ while the remaining two receivers (RA5 and RB5) are always active. RA1–RA4 and RB1–RB4 are put in a three-state mode when ENR is a logic high.

Receiver and Transmitter Enable Control Inputs

The MAX225 and MAX245–MAX249 feature transmitter and receiver enable controls.

The receivers have three modes of operation: full-speed receive (normal active)‚ three-state (disabled)‚ and low-power receive (enabled receivers continue to function at lower data rates). The receiver enable inputs control the full-speed receive and three-state modes. The transmit-ters have two modes of operation: full-speed transmit (normal active) and three-state (disabled). The transmit-ter enable inputs also control the shutdown mode. The device enters shutdown mode when all transmitters are disabled. Enabled receivers function in the low-power receive mode when in shutdown.

Integrated │ 15

MAX220–MAX249

Tables 1a–1d define the control states. The MAX244 has no control pins and is not included in these tables.The MAX246 has ten receivers and eight drivers with two control pins, each controlling one side of the device. A logic high at the A-side control input (ENA) causes the four A-side receivers and drivers to go into a three-state mode. Similarly, the B-side control input (ENB) causes the four B-side drivers and receivers to go into a three-state mode. As in the MAX245, one Aside and one B-side receiver (RA5 and RB5) remain active at all times. The entire device is put into shutdown mode when both the A and B sides are disabled (ENA = ENB = +5V).

The MAX247 provides nine receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs each control four drivers. The ninth receiver (RB5) is always active. The device enters shutdown mode with a logic high on both ENTA and ENTB.

The MAX248 provides eight receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs control four drivers each. This part does not have an always-active receiver. The device enters shutdown mode and transmit-ters go into a three-state mode with a logic high on both ENTA and ENTB.

+5V-Powered, MultichannelRS-232 Drivers/Receivers

The MAX249 provides ten receivers and six drivers with four control pins. The ENRA and ENRB receiver enable inputs each control five receiver outputs. The ENTA and ENTB transmitter enable inputs control three drivers each. There is no always-active receiver. The device enters shutdown mode and transmitters go into a three-state mode with a logic high on both ENTA and ENTB. In shutdown mode, active receivers operate in a low-power receive mode at data rates up to 20kb/s.

Applications Information

Figures 5 through 25 show pin configurations and typi-cal operating circuits. In applications that are sensitive to power-supply noise, Vwith a capacitor of the same value as C1 and C2 con-CC should be decoupled to ground nected as close as possible to the device.

Integrated │ 16

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

+5V INPUTTOP VIEWC3C5C1+1V+2C1-3C2+4C2-5V-6T2OUT7R2IN8+16VCC15GND14T1OUTC1C2MAX220MAX232MAX232A13R1IN12R1OUT11T1IN10T2IN9R2OUTTTL/CMOSINPUTS16V1CC2+10VC1+V++5V TO +10V3C1-VOLTAGE DOUBLER46-10VC2++10V TO -10VV-5C2-VOLTAGE INVERTERC4+5V400kΩ11T1IN+5V400kΩ10T2IN12R1OUTT2OUT7R1IN135kΩ9R2OUTR2IN85kΩGND15RS-232INPUTST1OUT14RS-232OUTPUTSDIP/SOCAPACITANCE (µF)DEVICEC1C2C3C4C5MAX2200.0470.330.330.330.33MAX2321.01.01.01.01.0MAX232A 0.10.10.10.10.1TTL/CMOSOUTPUTSFigure 5. MAX220/MAX232/MAX232A Pin Configuration and Typical Operating Circuit

TOP VIEWC5+5V INPUTC3ALL CAPACITORS = 0.1µF(N.C.) EN1C1+2V+3C1-4C2+5C2-6V-7T2OUT8R2IN9+(N.C.) EN118SHDN17VCC16GND15T1OUTC1+2V+3C1-4C2+5C2-6V-7T2OUT8R2IN9+20SHDN19VCC18GND17T1OUTC1C217VCC3+10VC1++5V TO +10VV+4C1-VOLTAGE DOUBLER5C2+7-10V+10V TO -10VV-6C2-C4VOLTAGE INVERTER2+5V400kΩ12T1IN(EXCEPT MAX220)T1OUT15(EXCEPT MAX220)T2OUT8R1IN145kΩ10R2OUT1(N.C.)ENR2IN95kΩGND16SHDN18RS-232INPUTSRS-232OUTPUTSMAX222MAX24214R1IN13R1OUT12T1IN11T2INMAX222MAX24216N.C.15R1IN14R1OUT13N.C.12T1IN11T2INTTL/CMOSOUTPUTSTTL/CMOSINPUTS+5V400kΩ11T2IN13R1OUT10R2OUTR2OUT10DIP/SOSSOP( ) ARE FOR MAX222 ONLY.PIN NUMBERS IN TYPICAL OPERATING CIRCUIT ARE FOR DIP/SO PACKAGES ONLY.Figure 6. MAX222/MAX242 Pin Configurations and Typical Operating Circuit

Integrated │ 17

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

+5VTOP VIEW0.1µF28+5VVCC400kΩENR1ENR2T1IN3T2IN4R1OUT5R2OUT6R3OUT7R3IN827VCC+328VCC27VCC26ENT25T3IN4T1IN+5V400kΩT2IN+5V400kΩT3IN+5V400kΩT4IN+5V400kΩT5INENTT5OUTR1OUTR1IN5kΩT4OUTT5OUTT3OUTT2OUTT1OUT1112MAX22524T4IN23T5IN22R4OUT21R5OUT20R5IN19R4IN18T3OUT17T4OUT16T5OUT15T5OUT25182417R2IN9R1IN10T1OUT11T2OUT12GND13GND1423265161510SO6R2OUTR2IN5kΩ9MAX225 FUNCTIONAL DESCRIPTION5 RECEIVERS5 TRANSMITTERS2 CONTROL PINS 1 RECEIVER ENABLE (ENR) 1 TRANSMITTER ENABLE (ENT)7R3OUTR3IN5kΩ822R4OUTR4IN5kΩ1921R5OUTR5IN5kΩ20PINS (ENR, GND, VCC, T5OUT) ARE INTERNALLY CONNECTED.CONNECT EITHER OR BOTH EXTERNALLY. T5OUT IS A SINGLE DRIVER.12ENRENRGND13GND14Figure 7. MAX225 Pin Configuration and Typical Operating Circuit

Integrated │ 18

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

TOP VIEW+5V INPUT1.0µF11VCC+5V TO +10VVOLTAGE DOUBLER+10V TO -10VVOLTAGE INVERTER121.0µF1.0µFC1+14C1-15C2+16C2-+5VV+V-13171.0µF1.0µF400kΩT3OUT1T1OUT2T2OUT3R2IN4R2OUT5T2IN6T1IN7R1OUT8R1IN9GND10VCC11C1+12V+13C1-14+7T1IN28T4OUT27R3IN26R3OUT25SHDN (SHDN)TTL/CMOSINPUTS20T3IN+5V400kΩ21T4IN6T2IN+5V400kΩ+5V400kΩT1T1OUT2T2T2OUT3RS-232OUTPUTSMAX223MAX24124EN (EN)23R4IN*22R4OUT*21T4IN20T3IN19R5OUT*18R5IN*17V-16C2-15C2+T3T3OUT1T4T4OUT288R1OUTR1R1IN95kΩ5R2OUTR2R2IN45kΩWide SO/SSOPLOGICOUTPUTS26R3OUTR3R3IN275kΩRS-232INPUTS22R4OUTR4R4IN235kΩ19R5OUT*R4 AND R5 IN MAX223 REMAIN ACTIVE IN SHUTDOWN.NOTE: PIN LABELS IN ( ) ARE FOR MAX241.24EN (EN)R5R5IN185kΩSHDN25(SHDN)GND10Figure 8. MAX223/MAX241 Pin Configuration and Typical Operating Circuit

Integrated │ 19

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

TOP VIEW8C1+10C1-1.0µF+5V INPUT71.0µF9T3OUT1+1.0µF20T4OUT19T5IN18N.C.17SHDN1.0µFT1OUT2T2OUT3T2IN4T1IN5GND6VCC7C1+811+10V TO -10VC2+1312V-VOLTAGE INVERTERC2-+5V5T1IN+5V4T2IN+5V400kΩT1400kΩT2400kΩT2OUT3T1OUT2VCCV++5V TO +10VVOLTAGE DOUBLER1.0µFMAX23016T5OUT15T4IN14T3IN13V-12C2-11C2+TTL/CMOSINPUTS14T3IN+5V15T4IN+5V19T5INV+9C1-10T3400kΩT4400kΩT5GND6T3OUT1RS-232OUTPUTST4OUT20DIP/SOT5OUT1617SHDNN.C.x18Figure 9. MAX230 Pin Configuration and Typical Operating Circuit

+5V INPUTTOP VIEW11.0µFC+1C-V-2321.0µF13 (15)C1+C1-+5V(10)TTL/CMOSINPUTS7(11)TTL/CMOSOUTPUTS6R2OUTR29400kΩ8T1IN+5V400kΩT2INR1OUTT2R1T1VCC+12V TO -12VVOLTAGE CONVERTER+7.5V TO +12VV+V-143(16)C21.0µF(13)+14V+13VCC12GNDC+1C-2V-3+16V+15VCC14GNDT1OUT11T2OUT4R2IN5R2OUT6T2IN7MAX23111T1OUTT2OUT410R1IN98R2IN5MAX23113T1OUT12R1IN11R1OUT10T1IN9N.C.RS-232OUTPUTST2OUT4R1IN105kΩR2IN55kΩ(12)RS-232INPUTSR1OUTR2OUT6T1INT2IN7N.C.8DIPSOGNDPIN NUMBERS IN ( ) ARE FOR SO PACKAGE.12 (14)Figure 10. MAX231 Pin Configurations and Typical Operating Circuit

Integrated │ 20

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

+5V INPUTTOP VIEW1.0µF7+5VVCC400kΩ20R2OUT19R2IN18T2OUT17V-TTL/CMOSINPUTS13TTL/CMOSOUTPUTS20R2OUT8 (13)C1+DO NOT MAKECONNECTIONS TO13 (14)C1-THESE PINS12 (10)V-INTERNAL -10V17V-POWER SUPPLYINTERNAL +10VPOWER SUPPLY14 (8)V+GND6GND9T2INR1OUT5kΩ2T1IN+5V400kΩT2OUT18R1IN4RS-232INPUTSR2IN195kΩC2+11 (12)C2+C2-CS-151610 (11)T1OUT5RS-232OUTPUTST2IN1+T1IN2R1OUT3R1IN4T1OUT5GND6VCC7(V+) C1+8MAX233MAX233A16C2-15C2+14V+ (C1-)13C1- (C1+)12V- (C2+)11C2+ (C2-)GND9(V-) CS-10DIP/SOPIN NAMES IN ( ) ARE FOR SO PACKAGE.Figure 11. MAX233/MAX233A Pin Configuration and Typical Operating Circuit

+5V INPUTTOP VIEW71.0µF910T1OUT1T2OUT2T2IN3T1IN4GND5VCC6C1+7V+8C1+C1-C2+1.0µF6VCC+5V TO +10VVOLTAGE DOUBLER+10V TO -10VVOLTAGE INVERTER+5V400kΩ4T1IN+5V400kΩ3T2INTTL/CMOSINPUTS13T3IN+5V400kΩ14T4INGND5T4T2T11.0µFV+8+16T3OUT15T4OUT14T4IN1.0µF11C2-V-121.0µFT1OUT1MAX23413T3IN12V-11C2-10C2+9C1-T2OUT2RS-232OUTPUTS+5V400kΩT3T3OUT16DIP/SOT4OUT15Figure 12. MAX234 Pin Configuration and Typical Operating Circuit

Integrated │ 21

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

TOP VIEW+5V INPUT1.0µF12+5V8T1IN+5V7T2IN+5VTTL/CMOSINPUTS24R3IN23R3OUT22T5IN21SHDN+5V22T5IN400kΩT5T5OUT1916T4IN15T3IN+5VVCC400kΩT1T1OUT3400kΩT2400kΩT3400kΩT4T4OUT1T3OUT2RS-232OUTPUTST2OUT4T4OUT1T3OUT2T1OUT3T2OUT4R2IN5R2OUT6T2IN7T1IN8R1OUT9R1IN10GND11VCC12+MAX23520EN19T5OUT18R4IN17R4OUT16T4IN15T3IN14R5OUT13R5IN9R1OUTT1R1IN105kΩ6R2OUTR2R2IN55kΩDIPTTL/CMOSOUTPUTS23R3OUTR3R3IN245kΩRS-232INPUTS17R4OUTR4R4IN185kΩ14R5OUT20ENR5R5IN135kΩGND11SHDN21Figure 13. MAX235 Pin Configuration and Typical Operating Circuit

Integrated │ 22

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

TOP VIEW1.0µF+5V INPUT9101.0µF12131.0µF14C1+C1-C2+C2-+5V7T1INT3OUT1T1OUT2T2OUT3R1IN4R1OUT5T2IN6T1IN7GND8VCC9C1+10V+11C1-12VCC+5V TO +10VVOLTAGE DOUBLER+10V TO -10VVOLTAGE INVERTERV+111.0µFV-151.0µF400kΩT1T1OUT2+24T4OUT23R2IN22R2OUT21SHDNTTL/CMOSINPUTS18T3IN6T2IN+5V400kΩT2+5V400kΩT3+5V400kΩ19T4INT4T4OUT24T3OUT1T2OUT3RS-232OUTPUTSMAX23620EN19T4IN18T3IN17R3OUT16R3IN15V-14C2-13C2+5R1OUTR1R1IN45kΩDIP/SOTTL/CMOSOUTPUTS22R2OUTR2R2IN235kΩ17R3OUTR3IN165kΩ20ENGND8SHDN21RS-232INPUTSR3Figure 14. MAX236 Pin Configuration and Typical Operating Circuit

Integrated │ 23

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

TOP VIEW+5V INPUT1.0µF9C1+C1-C2+C2-+5VT3OUT1T1OUT2T2OUT3R1IN4R1OUT5T2IN6T1IN7GND8VCC9C1+10V+11C1-12VCC+5V TO +10VVOLTAGE DOUBLER+10V TO -10VVOLTAGE INVERTER400kΩ24T4OUT23R2IN22R2OUT21T5IN6T2IN+5V7T1IN+5VT1400kΩT2400kΩTTL/CMOSINPUTS18T3IN+5VT3400kΩ19T4IN+5VT4400kΩ21T5INT5T5OUT20T4OUT24T3OUT1RS-232OUTPUTST2OUT3T1OUT2V+111.0µF101.0µF12131.0µF14V-151.0µF+MAX23720T5OUT19T4IN18T3IN17R3OUT16R3IN15V-14C2-13C2+DIP/SO5R1OUTR1R1IN5kΩ4TTL/CMOSOUTPUTS22R2OUTR2R2IN5kΩ23RS-232INPUTS17R3OUTR3R3IN5kΩ16GND8Figure 15. MAX237 Pin Configuration and Typical Operating Circuit

Integrated │ 24

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

TOP VIEW1.0µF+5V INPUT9101.0µF12131.0µF14C1+C1-C2+C2-+5VT2OUT1T1OUT2R2IN3R2OUT4T1IN5R1OUT6R1IN7GND8VCC9C1+10V+11C1-12VCC+5V TO +10VVOLTAGE DOUBLER+10V TO -10VVOLTAGE INVERTER400kΩ24T3OUT23R3IN22R3OUT21T4IN18T2INTTL/CMOSINPUTS19T3IN+5V400kΩ21T4INT4T4OUT20+5V400kΩT3T3OUT245T1IN+5VT1400kΩT2T2OUT1T1OUT2V+111.0µFV-151.0µF+MAX23820T4OUT19T3IN18T2IN17R4OUT16R4IN15V-14C2-13C2+RS-232OUTPUTS6R1OUTR1R1IN5kΩ7DIP/SO4R2OUTTTL/CMOSOUTPUTS22R3OUTR3R2R2IN5kΩR3IN5kΩ3RS-232INPUTS2317R4OUTR4R4IN5kΩ16GND816.MAX238 Pin Configuration and Typical Operating Circuit

Integrated │ 25

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

TOP VIEW+5V INPUT1.0µF461.0µF7C1+C1-+5V400kΩ24T1IN24T1IN23T2IN22R2OUT21R2INTTL/CMOSINPUTS23T2IN+5V400kΩ16T3INT3+5V400kΩT2VCC+7.5V TO +13.2VINPUT5V+V-81.0µF+10V TO -10VVOLTAGE INVERTERR1OUT1R1IN2GND3VCC4V+5C+6C-7V-8R5IN9R5OUT10R4OUT11R4IN12+T1T1OUT19T2OUT20RS-232OUTPUTSMAX23920T2OUT19T1OUT18R3IN17R3OUT16T3IN15N.C.14EN13T3OUTT3OUT131R1OUTR1R1IN5kΩ222R2OUTR2R2IN215kΩDIP/SOTTL/CMOSOUTPUTS17R3OUTR3R3IN185kΩRS-232INPUTS11R4OUTR4R4IN125kΩ10R5OUTR5R5IN95kΩ15N.C.14ENGND3Figure 17. MAX239 Pin Configuration and Typical Operating Circuit

Integrated │ 26

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

+5V INPUTTOP VIEW251.0µF1.0µF1.0µF19C1+VCC+5V TO +10VVOLTAGE DOUBLER+5V TO -10VVOLTAGE INVERTERV+V-26301.0µF1.0µF27C1-28C2+29C2-+5V15T1IN+5V14T2IN+5V400kΩT1400kΩT2400kΩT3400kΩT4400kΩT5R1T5OUTR1IN5kΩ4117T4OUT5T3OUT6RS-232OUTPUTST2OUT8T1OUT7N.C.R2INN.C.T2OUTT1OUTT3OUTT4OUTR3INR3OUTT5INN.C.1110987654321TTL/CMOSINPUTS4443424140393837363534N.C.SHDNENT5OUTR4INR4OUTT4INT3INR5OUTR5INN.C.37T3IN+5V38T4IN+5V2T5IN16R1OUTN.C.R2OUTT2INT1INR1OUTR1INGNDVCCN.C.N.C.N.C.1213141516171819202122+MAX24013R2OUTR2R2IN105kΩ2324252627282930313233N.C.N.C.C1+V+C1-C2+C2V-N.C.N.C.N.C.TTL/CMOSOUTPUTS3R3OUTR3R3IN45kΩRS-232INPUTSPlastic FP39R4OUTR4R4IN405kΩ36R5OUTR5R5IN355kΩ42ENGND18SHDN43Figure 18. MAX240 Pin Configuration and Typical Operating Circuit

Integrated │ 27

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

TOP VIEW0.1µF+5V INPUT0.1µF1610.1µFC1+1V+2C1-3C2+4C2-5V-6T2OUT7R2IN83416VCC15GND14T1OUT0.1µF5C1+C1-C2+C2-VCC+5V TO +10VVOLTAGE DOUBLER+10V TO -10VVOLTAGE INVERTER+5V400kΩV+2+10V+V-6-10V0.1µFMAX24313R1IN12R1OUT11T1IN10T2IN9R2OUTTTL/CMOSINPUTS10T2IN11T1IN+5VT1OUT14RS-232OUTPUTST2OUT7400kΩDIP/SO12R1OUTTTL/CMOSOUTPUTS9R2OUTRECEIVER INPUT≤ -3VOPEN≥ +3VR1 OUTPUTHIGHHIGHLOWR2 OUTPUTHIGHLOWLOWR1IN135kΩR2IN85kΩGND15RS-232INPUTSFigure 19. MAX243 Pin Configuration and Typical Operating Circuit

Integrated │ 28

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

TOP VIEW1µF21TA4OUTTA3OUTTA2OUTTA1OUTTB1OUTTB2OUTTB3OUTTB4OUTRA4INRA5INRB5IN1µF1µF+5V1µF20VCC+5V TO +10V VOLTAGE DOUBLER+10V TO -10V VOLTAGE INVERTER+5V400kΩ+5V22V+26V-1µF6543214443424140C1+23C1-24C2+25C2-2TA1OUT15TA1IN2TA2OUT16TA2IN3TA3OUT17TA3IN4TA4OUT18TA4IN9RA1IN5kΩ10RA1OUT8RA2IN5kΩ11RA2OUT7RA3IN5kΩ12RA3OUT6RA4IN5kΩ13RA4OUT5RA5IN5kΩ14RA5OUT+RA3INRA2INRA1INRA1OUTRA2OUTRA3OUTRA4OUTRA5OUTTA1INTA2INTA3IN7891011121314151617181920212223242526272839RB4IN38RB3IN37RB2IN36RB1IN35RB1OUT34RB2OUT33RB3OUT32RB4OUT31RB5OUT30TB1IN29TB2INTB1OUT44TB1IN30+5V400kΩ+5VTB2OUT43TB2IN29MAX244+5V400kΩ+5VTB3OUT42TB3IN28+5V400kΩ+5VTB4OUT41TB4IN27RB1IN365kΩRB1OUT35RB2IN375kΩRB2OUT34RB3IN385kΩRB3OUT33RB4IN395kΩRB4OUT32RB5IN405kΩRB5OUT31GNDC1+V+C1-C2+C2-V-TB4INTA4INPLCCMAX249 FUNCTIONAL DESCRIPTION10 RECEIVERS 5 A-SIDE RECEIVERS 5 B-SIDE RECEIVERS8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERSNO CONTROL PINSTB3INVCCGND19Figure 20. MAX244 Pin Configuration and Typical Operating Circuit

Integrated │ 29

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

+5VTOP VIEW1µF40ENR TA1IN TA2IN TA3IN TA4IN123456789+403938373635VCCENTTB1INTB2INTB3INTB4INRB5OUTRB4OUTRB3OUTRB2OUTRB1OUTRB1INRB2INRB3INRB4INRB5INTB1OUTTB2OUTTB3OUTTB4OUT16TA1OUT2TA1IN17TA2OUT3TA2IN18TA3OUT4TA3IN19TA4OUT5TA4IN1ENR11RA1IN5kΩ10RA1OUT12RA2IN5kΩ9RA2OUT+5VVCC400kΩ+5VTB1OUT24TB1IN38+5V400kΩ+5VTB2OUT23TB2IN37RA5OUTRA4OUT RA3OUT RA2OUT MAX2453433323130292827262524232221+5V400kΩ+5VTB3OUT22TB3IN36RA1OUT 10RA1IN 11RA2IN 12RA3IN 13RA4IN 14RA5IN 15TA1OUT 16TA2OUT 17TA3OUT 18TA4OUT 19GND 20+5V400kΩ+5VTB4OUT21TB4IN35ENT39RB1IN295kΩRB1OUT30RB2IN285kΩRB2OUT31RB3IN275kΩRB3OUT32RB4IN265kΩRB4OUT33RB5IN255kΩRB5OUT34DIP13RA3IN5kΩMAX245 FUNCTIONAL DESCRIPTION10 RECEIVERS 5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE) 5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE)8 TRANSMITTTERS 4 A-SIDE TRANSMITTERS2 CONTROL PINS 1 RECEIVER ENABLE (ENR) 1 TRANSMITTER ENABLE (ENT)8RA3OUT14RA4IN5kΩ7RA4OUT15RA5IN5kΩ6RA5OUTGND20Figure 21. MAX245 Pin Configuration and Typical Operating Circuit

Integrated │ 30

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

TOP VIEW1µF+5VENA TA1IN TA2IN TA3IN TA4INRA5OUTRA4OUT RA3OUT RA2OUT 123456789+40403938373635VCCENBTB1INTB2INTB3INTB4INRB5OUTRB4OUTRB3OUTRB2OUTRB1OUTRB1INRB2INRB3INRB4INRB5INTB1OUTTB2OUTTB3OUTTB4OUT5kΩ9RA2OUT13RA3IN5kΩ8RA3OUT14RA4IN5kΩ7RA4OUT15RA5IN5kΩ6RA5OUTGND205kΩRB2OUT31RB3IN275kΩRB3OUT32RB4IN265kΩRB4OUT33RB5IN255kΩRB5OUT3418TA3OUT400kΩ4TA3IN+5V19TA4OUT400kΩ5TA4IN1ENA11RA1IN5kΩ10RA1OUT12RA2INTB4IN35ENB39RB1IN295kΩRB1OUT30RB2IN28+5VTB4OUT21TB3IN3617TA2OUT400kΩ3TA2IN+5V+5VTB3OUT22TB2IN3716TA1OUT400kΩ2TA1IN+5V+5VTB2OUT23TB1IN38+5VVCC+5VTB1OUT24MAX2463433323130292827262524232221RA1OUT 10RA1IN 11RA2IN 12RA3IN 13RA4IN 14RA5IN 15TA1OUT 16TA2OUT 17TA3OUT 18TA4OUT 19GND 20DIPMAX246 FUNCTIONAL DESCRIPTION10 RECEIVERS 5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE) 5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE)8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERS2 CONTROL PINS ENABLE A-SIDE (ENA) ENABLE B-SIDE (ENB)Figure 22. MAX246 Pin Configuration and Typical Operating Circuit

Integrated │ 31

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

+5VTOP VIEW1µF40ENTA TA1IN TA2IN TA3IN TA4IN123456789+4039383736351ENTAVCCENTBTB1INTB2INTB3INTB4INRB4OUTRB3OUTRB2OUTRB1OUTENRB RB1INRB2INRB3INRB4INRB5INTB1OUTTB2OUTTB3OUTTB4OUT12RA1IN5kΩ10RA1OUT13RA2IN19TA4OUT18TA3OUT2TA1IN16TA1OUTVCC+5V+5VENTB39TB1OUT24400kΩTB1IN38+5V17TA2OUT400kΩ3TA2IN+5V+5VTB3OUT22400kΩ4TA3IN+5V+5VTB4OUT21400kΩ5TA4IN6RB5OUTTB4IN35RB5IN255kΩTB3IN36TB2IN37+5VTB2OUT23RB5OUTRA4OUT RA3OUT RA2OUT MAX2473433323130292827262524232221RA1OUT 10ENRA 11RA1IN 12RA2IN 13RA3IN 14RA4IN 15TA1OUT 16TA2OUT 17TA3OUT 18TA4OUT 19GND 20RB1IN295kΩRB1OUT31RB2IN285kΩRB2OUT32RB3IN275kΩRB3OUT33RB4IN265kΩRB4OUT34GND20ENRB30DIPMAX247 FUNCTIONAL DESCRIPTION9 RECEIVERS 4 A-SIDE RECEIVERS 5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE)8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERS4 CONTROL PINS ENABLE RECEIVER A-SIDE (ENRA) ENABLE RECEIVER B-SIDE (ENRB) ENABLE RECEIVER A-SIDE (ENTA) ENABLE RECEIVER B-SIDE (ENTB)5kΩ9RA2OUT14RA3IN5kΩ8RA3OUT15RA4IN5kΩ7RA4OUT11ENRAFigure 23. MAX247 Pin Configuration and Typical Operating Circuit

Integrated │ 32

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

TOP VIEW1µFTA4OUTTA3OUTTA2OUTTA1OUTTB1OUTTB2OUTTB3OUTTA4OUT21RB4IN1µF1µF+5V1µF20VCC+5V TO +10V VOLTAGE DOUBLER+10V TO -10V VOLTAGE INVERTER+5V+5VENTB27TB1OUT44400kΩ14TA1IN+5V2TA2OUT400kΩ15TA2IN+5V3TA3OUT400kΩ16TA3IN+5V4TA4OUT400kΩ17TA4IN8RA1IN5kΩTB4IN28RB1IN375kΩRB1OUT35RB2IN385kΩRB2OUT34RB3IN395kΩRB3OUT33RB4IN405kΩRB4OUT32GND19ENRB36+5VTB4OUT41TB3IN29+5VTB3OUT42TB2IN30+5VTB2OUT43TB1IN31V+V-22261µF6543214443424140C1+23C1-24C2+25C2-18ENTA1TA1OUTRA3INRA4IN+RA2INRA1INENRARA1OUTRA2OUTRA3OUTRA4OUTTA1INTA2INTA3INTA4IN7891011121314151617181920212223242526272839RB3IN38RB2IN37RB1IN36ENRB35RB1OUT34RB2OUT33RB3OUT32RB4OUT31TB1IN30TB2IN29TB3INMAX248GNDC1+V+C1-C2+C2-V-ENTBPLCCMAX248 FUNCTIONAL DESCRIPTION8 RECEIVERS 4 A-SIDE RECEIVERS 4 B-SIDE RECEIVERS8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERS4 CONTROL PINS ENABLE RECEIVER A-SIDE (ENRA) ENABLE RECEIVER B-SIDE (ENRB) ENABLE RECEIVER A-SIDE (ENTA) ENABLE RECEIVER B-SIDE (ENTB)TB4INENTAVCC10RA1OUT7RA2IN5kΩ11RA2OUT6RA3IN5kΩ12RA3OUT5RA4IN5kΩ13RA4OUT9ENRAFigure 24. MAX248 Pin Configuration and Typical Operating Circuit

Integrated │ 33

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

TOP VIEW1µFTA3OUTTA2OUTTA1OUTTB1OUTTB2OUTTB3OUT21RB5INRB4IN1µF1µF+5V1µF20VCC+5V TO +10V VOLTAGE DOUBLER+10V TO -10V VOLTAGE INVERTER+5V+5VENTB27TB1OUT44400kΩTB1IN30+5V+5VTB2OUT43400kΩTB2IN29+5V+5VTB3OUT42400kΩTB3IN28RB1IN375kΩRB1OUT35RB2IN385kΩRB2OUT34RB3IN395kΩRB3OUT33RB4IN405kΩRB4OUT32RB5IN415kΩRB5OUT31GND19ENRB36V+V-22261µF6543214443424140C1+23C1-24C2+25C2-18ENTA1TA1OUTRA3INRA4INRA5IN+RA2INRA1INENRARA1OUTRA2OUTRA3OUTRA4OUTRA5OUTTA1INTA2INTA3IN7891011121314151617181920212223242526272839RB3IN38RB2IN37RB1IN36ENRB35RB1OUT15TA1IN2TA2OUT16TA2IN3TA3OUT17TA3IN8RA1IN5kΩ10RA1OUT7RA2IN5kΩMAX24934RB2OUT33RB3OUT32RB4OUT31RB5OUT30TB1IN29TB2INGNDC1+V+C1-C2+C2-V-ENTBPLCCTB3INENTAVCCMAX249 FUNCTIONAL DESCRIPTION10 RECEIVERS 5 A-SIDE RECEIVERS 5 B-SIDE RECEIVERS6 TRANSMITTERS 3 A-SIDE TRANSMITTERS 3 B-SIDE TRANSMITTERS4 CONTROL PINS ENABLE RECEIVER A-SIDE (ENRA) ENABLE RECEIVER B-SIDE (ENRB) ENABLE RECEIVER A-SIDE (ENTA) ENABLE RECEIVER B-SIDE (ENTB)11RA2OUT6RA3IN5kΩ12RA3OUT5RA4IN5kΩ13RA4OUT4RA5IN5kΩ14RA5OUT9ENRAFigure 25. MAX249 Pin Configuration and Typical Operating Circuit

Integrated │ 34

MAX220–MAX249

Ordering Information

PARTTEMP RANGEPIN-PACKAGEMAX220CPE+0°C to +70°C16 Plastic DIPMAX220CSE+0°C to +70°C16 Narrow SOMAX220CWE+0°C to +70°C16 Wide SOMAX220C/D0°C to +70°CDice*MAX220EPE+-40°C to +85°C16 Plastic DIPMAX220ESE+-40°C to +85°C16 Narrow SOMAX220EWE+-40°C to +85°C16 Wide SOMAX220EJE-40°C to +85°C16 CERDIPMAX220MJE55°C to +125°C16 CERDIPMAX222CPN+0°C to +70°C18 Plastic DIPMAX222CWN+0°C to +70°C18 Wide SOMAX222C/D0°C to +70°CDice*MAX222EPN+-40°C to +85°C18 Plastic DIPMAX222EWN+-40°C to +85°C18 Wide SOMAX222EJN-40°C to +85°C18 CERDIPMAX222MJN55°C to +125°C18 CERDIPMAX223CAI+0°C to +70°C28 SSOPMAX223CWI+0°C to +70°C28 Wide SOMAX223C/D0°C to +70°CDice*MAX223EAI+-40°C to +85°C28 SSOPMAX223EWI+-40°C to +85°C28 Wide SOMAX225CWI+0°C to +70°C28 Wide SOMAX225EWI+-40°C to +85°C28 Wide SOMAX230CPP+0°C to +70°C20 Plastic DIP1MAX230CWP+0°C to +70°C20 Wide SOMAX230C/D0°C to +70°CDice*MAX230EPP+-40°C to +85°C20 Plastic DIPMAX230EWP+-40°C to +85°C20 Wide SOMAX230EJP-40°C to +85°C20 CERDIPMAX230MJP55°C to +125°C20 CERDIPMAX231CPD+0°C to +70°C14 Plastic DIPMAX231CWE+0°C to +70°C16 Wide SOMAX231CJD0°C to +70°C14 CERDIPMAX231C/D0°C to +70°CDice*MAX231EPD+

-40°C to +85°C

14 Plastic DIP

+5V-Powered, MultichannelRS-232 Drivers/Receivers

PARTTEMP RANGEPIN-PACKAGEMAX231EWE+-40°C to +85°C16 Wide SOMAX231EJD-40°C to +85°C14 CERDIPMAX231MJD55°C to +125°C14 CERDIPMAX232CPE+0°C to +70°C16 Plastic DIPMAX232CSE+0°C to +70°C16 Narrow SOMAX232CWE+0°C to +70°C16 Wide SOMAX232C/D0°C to +70°CDice*MAX232EPE+-40°C to +85°C16 Plastic DIPMAX232ESE+-40°C to +85°C16 Narrow SOMAX232EWE+-40°C to +85°C16 Wide SOMAX232EJE-40°C to +85°C16 CERDIPMAX232MJE55°C to +125°C16 CERDIPMAX232MLP+55°C to +125°C20 LCCMAX232ACPE+0°C to +70°C16 Plastic DIPMAX232ACSE+0°C to +70°C16 Narrow SOMAX232ACWE+0°C to +70°C16 Wide SOMAX232AC/D0°C to +70°CDice*MAX232AEPE+-40°C to +85°C16 Plastic DIPMAX232AESE+-40°C to +85°C16 Narrow SOMAX232AEWE+-40°C to +85°C16 Wide SOMAX232AEJE-40°C to +85°C16 CERDIPMAX232AMJE55°C to +125°C16 CERDIPMAX232AMLP+55°C to +125°C20 LCCMAX233CPP+0°C to +70°C20 Plastic DIPMAX233EPP+-40°C to +85°C20 Plastic DIPMAX233ACPP+0°C to +70°C20 Plastic DIPMAX233ACWP+0°C to +70°C20 Wide SOMAX233AEPP+-40°C to +85°C20 Plastic DIPMAX233AEWP+-40°C to +85°C20 Wide SOMAX234CPE+0°C to +70°C16 Plastic DIPMAX234CWE+0°C to +70°C16 Wide SOMAX234C/D0°C to +70°CDice*MAX234EPE+

-40°C to +85°C

16 Plastic DIP

+Denotes a lead(Pb)-free/RoHS-compliant package.*Contact factory for dice specifications.

Integrated │ 35

MAX220–MAX249

Ordering Information (continued)

PARTTEMP RANGEPIN-PACKAGEMAX234EWE+-40°C to +85°C16 Wide SOMAX234EJE-40°C to +85°C16 CERDIPMAX234MJE55°C to +125°C16 CERDIPMAX235CPG+0°C to +70°C24 Wide Plastic DIPMAX235EPG+-40°C to +85°C24 Wide Plastic DIPMAX235EDG-40°C to +85°C24 Ceramic SBMAX235MDG55°C to +125°C24 Ceramic SBMAX236CNG+0°C to +70°C24 Narrow Plastic DIPMAX236CWG+0°C to +70°C24 Wide SOMAX236C/D0°C to +70°CDice*

MAX236ENG+-40°C to +85°C24 Narrow Plastic DIPMAX236EWG+-40°C to +85°C24 Wide SOMAX236ERG-40°C to +85°C24 Narrow CERDIPMAX236MRG55°C to +125°C24 Narrow CERDIPMAX237CNG+0°C to +70°C24 Narrow Plastic DIPMAX237CWG+0°C to +70°C24 Wide SOMAX237C/D0°C to +70°CDice*

MAX237ENG+-40°C to +85°C24 Narrow Plastic DIPMAX237EWG+-40°C to +85°C24 Wide SOMAX237ERG-40°C to +85°C24 Narrow CERDIPMAX237MRG55°C to +125°C24 Narrow CERDIPMAX238CNG+0°C to +70°C24 Narrow Plastic DIPMAX238CWG+0°C to +70°C24 Wide SOMAX238C/D0°C to +70°CDice*

MAX238ENG+-40°C to +85°C24 Narrow Plastic DIPMAX238EWG+-40°C to +85°C24 Wide SOMAX238ERG-40°C to +85°C24 Narrow CERDIPMAX238MRG55°C to +125°C24 Narrow CERDIPMAX239CNG+0°C to +70°C24 Narrow Plastic DIPMAX239CWG+0°C to +70°C24 Wide SOMAX239C/D0°C to +70°CDice*

MAX239ENG+-40°C to +85°C24 Narrow Plastic DIPMAX239EWG+-40°C to +85°C24 Wide SOMAX239ERG-40°C to +85°C24 Narrow CERDIPMAX239MRG

55°C to +125°C

24 Narrow CERDIP

+5V-Powered, MultichannelRS-232 Drivers/Receivers

PARTTEMP RANGEPIN-PACKAGEMAX240CMH+0°C to +70°C44 Plastic FPMAX240C/D0°C to +70°CDice*MAX241CAI+0°C to +70°C28 SSOPMAX241CWI+0°C to +70°C28 Wide SOMAX241C/D0°C to +70°CDice*MAX241EAI+-40°C to +85°C28 SSOPMAX241EWI+-40°C to +85°C28 Wide SOMAX242CAP+0°C to +70°C20 SSOPMAX242CPN+0°C to +70°C18 Plastic DIPMAX242CWN+0°C to +70°C18 Wide SOMAX242C/D0°C to +70°CDice*MAX242EPN+-40°C to +85°C18 Plastic DIPMAX242EWN+-40°C to +85°C18 Wide SOMAX242EJN-40°C to +85°C18 CERDIPMAX242MJN55°C to +125°C18 CERDIPMAX243CPE+0°C to +70°C16 Plastic DIPMAX243CSE+0°C to +70°C16 Narrow SOMAX243CWE+0°C to +70°C16 Wide SOMAX243C/D0°C to +70°CDice*MAX243EPE+-40°C to +85°C16 Plastic DIPMAX243ESE+-40°C to +85°C16 Narrow SOMAX243EWE+-40°C to +85°C16 Wide SOMAX243EJE-40°C to +85°C16 CERDIPMAX243MJE55°C to +125°C16 CERDIPMAX244CQH+0°C to +70°C44 PLCCMAX244C/D0°C to +70°CDice*MAX244EQH+-40°C to +85°C44 PLCCMAX245CPL+0°C to +70°C40 Plastic DIPMAX245C/D0°C to +70°CDice*MAX245EPL+-40°C to +85°C40 Plastic DIPMAX246CPL+0°C to +70°C40 Plastic DIPMAX246C/D0°C to +70°CDice*MAX246EPL+

-40°C to +85°C

40 Plastic DIP

+Denotes a lead(Pb)-free/RoHS-compliant package.*Contact factory for dice specifications.

Integrated │ 36

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

Ordering Information (continued)

PARTMAX247CPL+MAX247C/DMAX247EPL+MAX248CQH+MAX248C/DMAX248EQH+MAX249CQH+MAX249EQH+

TEMP RANGE0°C to +70°C0°C to +70°C-40°C to +85°C0°C to +70°C0°C to +70°C-40°C to +85°C0°C to +70°C-40°C to +85°C

PIN-PACKAGE40 Plastic DIPDice*40 Plastic DIP44 PLCCDice*44 PLCC44 PLCC44 PLCC

+Denotes a lead(Pb)-free/RoHS-compliant package.*Contact factory for dice specifications.

Selection Table

PART NUMBERMAX220MAX222MAX223MAX225MAX230MAX231MAX232MAX232AMAX233MAX233AMAX234MAX235MAX236MAX237MAX238MAX239MAX240MAX241MAX242MAX243MAX244MAX245MAX246MAX247MAX248MAX249

NO. OF

POWER

RS-232

SUPPLY

Drivers/

(V)

+5+5+5+5+5+5 and+7.5 to+5+5+5+5+5+5+5+5+5+5 and+7.5 to+5+5+5+5+5+5+5+5+5+5

2/22/24/55/55/02/22/22/22/22/24/05/54/35/34/43/55/54/52/22/28/108/108/108/98/86/10

SHDN

NOMINAL Rx DATA

NO. OF AND

CAPACITOR ACTIVE RATE

EXT CAPTHREE-

VALUE (µF)IN SHDN(kbps)

STATE

44404244004044424444400044

0.047, 0.330.11.0, 0.1—1.0, 0.11.0, 0.11.0, 0.10.1——1.0, 0.1—1.0, 0.11.0, 0.11.0, 0.11.0, 0.11.01.0, 0.10.10.11.0———1.01.0

NoYesYesYesYesNoNoNoNoNoNoYesYesNoNoNoYesYesYesNoNoYesYesYesYesYes

NoNoYesYesNoNoNoNoNoNoNoNoNoNoNoNoNoNoYesNoNoYesYesYesYesYes

120200120120120120

FEATURES

Ultra-low-power, industry-standard pinout

Low-power shutdown

MAX241 and receivers active in shutdownAvailable in SO

5 drivers with shutdown

Standard +5/+12V or battery supplies;same functions as MAX232

120 (64)Industry standard

Higher slew rate, small caps200

No external caps120

No external caps, high slew rate200120

120120120120120120120200200120120120120120120

Replaces 1488No external caps

Shutdown, three state

Complements IBM PC serial portReplaces 1488 and 1489

Standard +5/+12V or battery supplies;single-package solution for IBM PC serialDIP or flatpack package

Complete IBM PC serial port

Separate shutdown and enable

Open-line detection simplifies cablingHigh slew rate

High slew rate, int. caps, two shutdownHigh slew rate, int. caps, three shutdownHigh slew rate, int. caps, nine operatingHigh slew rate, selective half-chip enablesAvailable in quad flatpack package

Integrated │ 37

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

Package Information

For the latest package outline information and land patterns (footprints), go to /packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.PACKAGEPACKAGEOUTLINELANDTYPECODENO.

PATTERN NO.

14 PDIPP14+316 PDIPP16+116 PDIPP16+216 PDIPP16+318 PDIPP18+521-004320 PDIPP20+320 PDIPP20M+124 PDIPN24+324 PDIPP24M+1—

28 PDIPP28+240 PDIPP40+121-004440 PDIPP40M+214 CERDIPJ14-316 CERDIPJ16-318 CERDIPJ18-221-004520 CERDIPJ20-224 CERDIPR24-416 SO(N)S16+316 SO(N)

S16+5

21-004190-0097Terminal Connections

01,03,0501,03,0502020404J16L20J18L20J18L201C1+NCNCNCENEN2V+C1+C1+C1+C1+C1+3C1-V+V+V+V+V+4C2+C1-C1-C1-C1-C1-5C2-C2+C2+C2+C2+C2+6V-NCC2-NCC2-NC7T2OUTC2-V-C2-V-C2-8R2INV-T2OUTV-T2OUTV-9R2OUTT2OUTR2INT2OUTR2INT2OUT10

T2IN

R2IN

R2OUT

R2IN

R2OUT

R2IN

PACKAGEPACKAGEOUTLINELANDTYPECODENO.

PATTERN NO.

16 SO(W)W16+116 SO(W)W16+290-010716 SO(W)W16+318 SO(W)W18+190-018120 SO(W)W20+320 SO(W)W20M+121-004290-010824 SO(W)W24+290-018228 SO(W)W28+128 SO(W)W28+290-010928 SO(W)W28M+120 LCCL20+321-065890-017720 SSOPA20+190-009424 SSOPA24+228 SSOPA28+121-065890-011090-009516 TSSOPU16+190-011716 FPCKF16-321-0013—44 MQFPM44+521-082690-016944 PLCCQ44+144 PLCC

Q44+2

21-004990-023601,03,0501,03,0502020404J16L20J18L20J18L2011T1INNCT2INNCT2INNC12R1OUTR2OUTT1INR2OUTT1INR2OUT13R1INT2INR1OUTT2INR1OUTT2IN14T1OUTT1INR1INT1INR1INT1IN15GNDR1OUTT1OUTR1OUTT1OUTR1OUT16VCC

NCGNDR1INGNDR1IN17R1INVCCT1OUTVCCT1OUT18T1OUTSHND

GNDSHND

GND19GNDVCCVCC20

VCC

SHND

Integrated │ 38

MAX220–MAX249

+5V-Powered, MultichannelRS-232 Drivers/Receivers

Revision History

REVISION REVISION NUMBERDATE

1/06

DESCRIPTION

Added part information to the lead temperature in the Absolute Maximum Ratings

sections

Changed multiple packages to lead-free versions; updated/added notes 3, 4, 5, 7, and 8 to the Electrical Characteristics table; removed incorrect subscripting from all pin names in the Electrical Characteristics table and Pin ConfigurationsUpdated General Description and Benefits and Features sectionsAdd Terminal Connections table

PAGESCHANGED2, 5, 8

161718

7/101/155/19

1, 2–9, 17–36

138

For pricing, delivery, and ordering information, please visit Integrated’s online storefront at https:///en/storefront/storefront.html.

Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Integrated product. No circuit patent licenses are implied. Integrated reserves the right to change the circuitry and speciications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.

Integrated and the Integrated logo are trademarks of Integrated Products, Inc.

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