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MAX232CPE Multichannel RS-232 Drivers/Receivers

Published:2011/5/10 10:05:00 |

General Description

The MAX220MAX249 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.


These parts are especially useful in battery-powered systems,

since their low-power shutdown mode reduces

power dissipation to less than 5μW. The MAX225,

MAX233, MAX235, and MAX245/MAX246/MAX247 use

no external components and are recommended for applications

where printed circuit board space is critical.

________________________Applications

Portable Computers

Low-Power Modems

Interface Translation


Battery-Powered RS-232 Systems


Multidrop RS-232 Networks


____________________________Features


Superior to Bipolar


 Operate from Single +5V Power Supply


(+5V and +12V—MAX231/MAX239)


 Low-Power Receive Mode in Shutdown


(MAX223/MAX242)


 Meet All EIA/TIA-232E and V.28 Specifications


 Multiple Drivers and Receivers


 3-State Driver and Receiver Outputs


 Open-Line Detection (MAX243)


Ordering Information


Ordering Information continued at end of data sheet.


*Contact factory for dice specifications.


MAX220MAX249


+5V-Powered, Multichannel RS-232


Drivers/Receivers


________________________________________________________________ Maxim Integrated Products 1


Selection Table


19-4323; Rev 9; 4/00


PART


MAX220CPE


MAX220CSE


MAX220CWE 0°C to +70°C


0°C to +70°C


0°C to +70°C


TEMP. RANGE PIN-PACKAGE


16 Plastic DIP


16 Narrow SO


16 Wide SO


MAX220C/D 0°C to +70°C Dice*


MAX220EPE


MAX220ESE


MAX220EWE -40°C to +85°C


-40°C to +85°C


-40°C to +85°C 16 Plastic DIP


16 Narrow SO


16 Wide SO


MAX220EJE -40°C to +85°C 16 CERDIP


MAX220MJE -55°C to +125°C 16 CERDIP


Power No. of Nominal SHDN Rx


Part Supply RS-232 No. of Cap. Value & Three- Active in Data Rate


Number (V) Drivers/Rx Ext. Caps (μF) State SHDN (kbps) Features


MAX220 +5 2/2 4 4.7/10 No — 120 Ultra-low-power, industry-standard pinout


MAX222 +5 2/2 4 0.1 Yes — 200 Low-power shutdown


MAX223 (MAX213) +5 4/5 4 1.0 (0.1) Yes ✔ 120 MAX241 and receivers active in shutdown


MAX225 +5 5/5 0 — Yes ✔ 120 Available in SO


MAX230 (MAX200) +5 5/0 4 1.0 (0.1) Yes — 120 5 drivers with shutdown


MAX231 (MAX201) +5 and 2/2 2 1.0 (0.1) No — 120 Standard +5/+12V or battery supplies;


+7.5 to +13.2 same functions as MAX232


MAX232 (MAX202) +5 2/2 4 1.0 (0.1) No — 120 (64) Industry standard


MAX232A +5 2/2 4 0.1 No — 200 Higher slew rate, small caps


MAX233 (MAX203) +5 2/2 0 — No — 120 No external caps


MAX233A +5 2/2 0 — No — 200 No external caps, high slew rate


MAX234 (MAX204) +5 4/0 4 1.0 (0.1) No — 120 Replaces 1488


MAX235 (MAX205) +5 5/5 0 — Yes — 120 No external caps


MAX236 (MAX206) +5 4/3 4 1.0 (0.1) Yes — 120 Shutdown, three state


MAX237 (MAX207) +5 5/3 4 1.0 (0.1) No — 120 Complements IBM PC serial port


MAX238 (MAX208) +5 4/4 4 1.0 (0.1) No — 120 Replaces 1488 and 1489


MAX239 (MAX209) +5 and 3/5 2 1.0 (0.1) No — 120 Standard +5/+12V or battery supplies;


+7.5 to +13.2 single-package solution for IBM PC serial port


MAX240 +5 5/5 4 1.0 Yes — 120 DIP or flatpack package


MAX241 (MAX211) +5 4/5 4 1.0 (0.1) Yes — 120 Complete IBM PC serial port


MAX242 +5 2/2 4 0.1 Yes ✔ 200 Separate shutdown and enable


MAX243 +5 2/2 4 0.1 No — 200 Open-line detection simplifies cabling


MAX244 +5 8/10 4 1.0 No — 120 High slew rate


MAX245 +5 8/10 0 — Yes ✔ 120 High slew rate, int. caps, two shutdown modes


MAX246 +5 8/10 0 — Yes ✔ 120 High slew rate, int. caps, three shutdown modes


MAX247 +5 8/9 0 — Yes ✔ 120 High slew rate, int. caps, nine operating modes


MAX248 +5 8/8 4 1.0 Yes ✔ 120 High slew rate, selective half-chip enables


MAX249 +5 6/10 4 1.0 Yes ✔ 120 Available in quad flatpack package


For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.


For small orders, phone 1-800-835-8769.


MAX220MAX249


+5V-Powered, Multichannel RS-232


Drivers/Receivers


2 _______________________________________________________________________________________


ABSOLUTE MAXIMUM RATINGS—MAX220/222/232A/233A/242/243


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 1: Input voltage measured with TOUT in high-impedance state, SHDN or VCC = 0V.


Note 2: For the MAX220, V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V.


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.


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


Input Voltages


TIN..............................................................-0.3V to (VCC - 0.3V)


RIN (Except MAX220) ........................................................±30V


RIN (MAX220).....................................................................±25V


TOUT (Except MAX220) (Note 1) .......................................±15V


TOUT (MAX220)...............................................................±13.2V


Output Voltages


TOUT...................................................................................±15V


ROUT.........................................................-0.3V to (VCC + 0.3V)


Driver/Receiver Output Short Circuited to GND.........Continuous


Continuous 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


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).....842mW


Operating 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°C


Storage Temperature Range .............................-65°C to +160°C


Lead Temperature (soldering, 10sec) .............................+300°C


Input Logic Threshold Low 1.4 0.8 V


PARAMETER CONDITIONS MIN TYP MAX UNITS


Input Logic Threshold High


All except MAX220 2 1.4


V


All except MAX220, normal operation 5 40


Logic Pull-Up/lnput Current


SHDN = 0V, MAX222/242, shutdown, MAX220 ±0.01 ±1


μA


VCC = 5.5V, SHDN = 0V, VOUT = ±15V, MAX222/242 ±0.01 ±10


Output Leakage Current


VCC = SHDN = 0V, VOUT = ±15V ±0.01 ±10


μA


Data Rate All except MAX220, normal operation 200 116 kb/s


Transmitter Output Resistance VCC = V+ = V- = 0V, VOUT = ±2V 300 10M Ω


Output Short-Circuit Current VOUT = 0V ±7 ±22 mA


RS-232 Input Voltage Operating Range ±30 V


All except MAX243 R2IN 0.8 1.3


RS-232 Input Threshold Low VCC = 5V


MAX243 R2IN (Note 2) -3


V


All except MAX243 R2IN 1.8 2.4


RS-232 Input Threshold High VCC = 5V


MAX243 R2IN (Note 2) -0.5 -0.1


V


All except MAX243, VCC = 5V, no hysteresis in shdn. 0.2 0.5 1


RS-232 Input Hysteresis


MAX243 1


V


RS-232 Input Resistance 3 5 7 kΩ


TTL/CMOS Output Voltage Low IOUT = 3.2mA 0.2 0.4 V


TTL/CMOS Output Voltage High IOUT = -1.0mA 3.5 VCC - 0.2 V


Sourcing VOUT = GND -2 -10


TTL/CMOS Output Short-Circuit Current mA


Shrinking VOUT = VCC 10 30


Output Voltage Swing All transmitter outputs loaded with 3kΩ to GND ±5 ±8 V


RS-232 TRANSMITTERS


RS-232 RECEIVERS


MAX220: VCC = 5.0V 2.4


MAX220MAX249


+5V-Powered, Multichannel RS-232


Drivers/Receivers


_______________________________________________________________________________________ 3


Note 3: MAX243 R2OUT is guaranteed to be low when R2IN is ≥ 0V or is floating.


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.)


Operating Supply Voltage


SHDN Threshold High


4.5 5.5 V


MAX222/242


Transmitter-Output Enable Time


(SHDN goes high), Figure 4


2.0 1.4 V


MAX220 0.5 2


tET


No load


MAX222/232A/233A/242/243 4 10


MAX222/232A/233A/242/243 6 12 30


MAX220 12


VCC Supply Current (SHDN = VCC),


Figures 5, 6, 11, 19 3kΩ load


both inputs MAX222/232A/233A/242/243 15


mA


Transition Slew Rate


TA = +25°C 0.1 10


CL = 50pF to 2500pF,


RL = 3kΩ to 7kΩ,


VCC = 5V, TA = +25°C,


measured from +3V


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


TA = 0°C to +70°C


CONDITIONS


2 50


MAX220 1.5 3 30


V/μs


TA = -40°C to +85°C 2 50


MAX222/242, 0.1μF caps


(includes charge-pump start-up)


Shutdown Supply Current MAX222/242


TA = -55°C to +125°C 35 100


μA


SHDN Input Leakage Current MAX222/242 ±1 μA


SHDN Threshold Low MAX222/242 1.4 0.8 V


250


MAX222/232A/233A/242/243 1.3 3.5


μs


tPHLT MAX220 4 10


Transmitter-Output Disable Time


(SHDN goes low), Figure 4


tDT


MAX222/232A/233A/242/243 1.5 3.5


Transmitter Propagation Delay


TLL to RS-232 (normal operation),


Figure 1 tPLHT MAX220 5 10


μs


2.0 1.4 V


MAX222/242, 0.1μF caps


±0.05 ±10 μA


600


TTL/CMOS Output Leakage Current


EN Input Threshold High


MAX222/232A/233A/242/243 0.5 1


ns


tPHLR MAX220 0.6 3


tPLHR


MAX222/232A/233A/242/243 0.6 1


Receiver Propagation Delay


RS-232 to TLL (normal operation),


Figure 2


tPHLT - tPLHT


MAX220 0.8 3


μs


MAX222/232A/233A/242/243


Receiver Propagation Delay tPHLS MAX242 0.5 10


RS-232 to TLL (shutdown), Figure 2 tPLHS MAX242 2.5 10


μs


Receiver-Output Enable Time, Figure 3 tER MAX242


MIN TYP MAX UNITS


125 500


PARAMETER


MAX242


ns


SHDN = VCC or EN = VCC (SHDN = 0V for MAX222),


0V ≤ VOUT ≤ VCC


Receiver-Output Disable Time, Figure 3 tDR MAX242 160 500 ns


300


ns


Transmitter + to - Propagation


Delay Difference (normal operation) MAX220 2000


tPHLR - tPLHR


MAX222/232A/233A/242/243 100


ns


Receiver + to - Propagation


Delay Difference (normal operation) MAX220 225


EN Input Threshold Low MAX242 1.4 0.8 V


MAX220MAX249


+5V-Powered, Multichannel RS-232


Drivers/Receivers


4 _______________________________________________________________________________________


__________________________________________Typical Operating Characteristics


MAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243


10


8


-10


0 5 15 25


OUTPUT VOLTAGE vs. LOAD CURRENT


-4


-6


-8


-2


6


4


2


MAX220-01


LOAD CURRENT (mA)


OUTPUT VOLTAGE (V)


10


0


20


0.1μF


EITHER V+ OR V- LOADED


VCC = ±5V


NO LOAD ON


TRANSMITTER OUTPUTS


(EXCEPT MAX220, MAX233A)


V- LOADED, NO LOAD ON V+


V+ LOADED, NO LOAD ON V-


1μF


0.1μF 1μF


11


10


4


0 10 40 60


AVAILABLE OUTPUT CURRENT


vs. DATA RATE


6


5


7


9


8


MAX220-02


DATA RATE (kbits/sec)


OUTPUT CURRENT (mA)


20 30 50


OUTPUT LOAD CURRENT


FLOWS FROM V+ TO VVCC


= +5.25V


ALL CAPS


1μF


ALL CAPS


0.1μF


VCC = +4.75V


+10V


-10V


MAX222/MAX242


ON-TIME EXITING SHUTDOWN


+5V


+5V


0V


0V


MAX220-03


500μs/div


V+, V- VOLTAGE (V)


1μF CAPS


V+


V+


V- VSHDN


0.1μF CAPS


1μF CAPS


0.1μF CAPS


MAX220MAX249


+5V-Powered, Multichannel RS-232


Drivers/Receivers


_______________________________________________________________________________________ 5


VCC...........................................................................-0.3V to +6V


V+................................................................(VCC - 0.3V) to +14V


V- ............................................................................+0.3V to -14V


Input Voltages


TIN ............................................................-0.3V to (VCC + 0.3V)


RIN......................................................................................±30V


Output Voltages


TOUT ...................................................(V+ + 0.3V) to (V- - 0.3V)


ROUT.........................................................-0.3V to (VCC + 0.3V)


Short-Circuit Duration, TOUT ......................................Continuous


Continuous 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)......500mW


16-Pin Wide SO (derate 9.52mW/°C above +70°C).........762mW


20-Pin Wide SO (derate 10 00mW/°C above +70°C).......800mW


24-Pin Wide SO (derate 11.76mW/°C above +70°C).......941mW


28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W


44-Pin Plastic FP (derate 11.11mW/°C above +70°C) .....889mW


14-Pin CERDIP (derate 9.09mW/°C above +70°C) ..........727mW


16-Pin CERDIP (derate 10.00mW/°C above +70°C) ........800mW


20-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).............762mW


Operating Temperature Ranges


MAX2 _ _ C _ _......................................................0°C to +70°C


MAX2 _ _ E _ _...................................................-40°C to +85°C


MAX2 _ _ M _ _ ...............................................-55°C to +125°C


Storage Temperature Range .............................-65°C to +160°C


Lead Temperature (soldering, 10sec) .............................+300°C


ABSOLUTE MAXIMUM RATINGS—MAX223/MAX230–MAX241


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.)


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.


CONDITIONS MIN TYP MAX UNITS


Output Voltage Swing All transmitter outputs loaded with 3kΩ to ground ±5.0 ±7.3 V


VCC Power-Supply Current


No load,


TA = +25°C


5 10


7 15 mA


0.4 1


V+ Power-Supply Current


1.8 5


mA


5 15


Shutdown Supply Current TA = +25°C


15 50


Input Logic Threshold High V


TIN 2.0


EN, SHDN (MAX223);


EN, SHDN (MAX230/235/236/240/241)


2.4


Logic Pull-Up Current TIN = 0V 1.5 200


Receiver Input Voltage


Operating Range


-30 30 V


μA


μA


1 10


Input Logic Threshold Low TIN; EN, SHDN (MAX233); EN, SHDN (MAX230/235–241) 0.8 V


MAX231/239


MAX223/230/234–238/240/241


MAX232/233


PARAMETER


MAX239


MAX230/235/236/240/241


MAX231


MAX223


mA


MAX220MAX249


+5V-Powered, Multichannel RS-232


Drivers/Receivers


6 _______________________________________________________________________________________


V


0.8 1.2


PARAMETER CONDITIONS MIN TYP MAX UNITS


Normal operation


SHDN = 5V (MAX223)


SHDN = 0V (MAX235/236/240/241)


1.7 2.4


RS-232 Input Threshold Low


TA = +25°C,


VCC = 5V


0.6 1.5


RS-232 Input Threshold High V


TA = +25°C,


VCC = 5V Shutdown (MAX223)


SHDN = 0V,


EN = 5V (R4IN‚ R5IN)


1.5 2.4


ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241 (continued)


(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.)


Shutdown (MAX223)


SHDN = 0V,


EN = 5V (R4IN, R5IN)


Normal operation


SHDN = 5V (MAX223)


SHDN = 0V (MAX235/236/240/241)


RS-232 Input Hysteresis VCC = 5V, no hysteresis in shutdown 0.2 0.5 1.0 V


RS-232 Input Resistance TA = +25°C, VCC = 5V 3 5 7 kΩ


TTL/CMOS Output Voltage Low IOUT = 1.6mA (MAX231/232/233, IOUT = 3.2mA) 0.4 V


TTL/CMOS Output Voltage High IOUT = -1mA 3.5 VCC - 0.4 V


TTL/CMOS Output Leakage Current


0V ≤ ROUT ≤ VCC; EN = 0V (MAX223);


EN = VCC (MAX235–241 )


0.05 ±10 μA


MAX223 600


Receiver Output Enable Time ns


Normal


operation MAX235/236/239/240/241 400


MAX223 900


Receiver Output Disable Time ns


Normal


operation MAX235/236/239/240/241 250


Normal operation 0.5 10


SHDN = 0V μs


(MAX223)


Propagation Delay 4 40


RS-232 IN to


TTL/CMOS OUT,


CL = 150pF 6 40


3 5.1 30


V/μs


MAX231/MAX232/MAX233, TA = +25°C, VCC = 5V,


RL = 3kΩ to 7kΩ, CL = 50pF to 2500pF, measured from


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


4 30


Transmitter Output Resistance VCC = V+ = V- = 0V, VOUT = ±2V 300 Ω


Transmitter Output Short-Circuit


Current


±10 mA


tPHLS


tPLHS


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


MAX220MAX249


+5V-Powered, Multichannel RS-232


Drivers/Receivers


_______________________________________________________________________________________ 7


8.5


6.5


4.5 5.5


TRANSMITTER OUTPUT


VOLTAGE (VOH) vs. VCC


7.0


8.0


MAX220-04


VCC (V)


VOH (V)


5.0


7.5


1 TRANSMITTER


LOADED


3 TRANSMITTERS


LOADED


4 TRANSMITTERS


LOADED


2 TRANSMITTERS


LOADED


TA = +25°C


C1–C4 = 1μF


TRANSMITTER


LOADS =


3kΩ || 2500pF


7.4


6.0


0 2500


TRANSMITTER OUTPUT VOLTAGE (VOH)


vs. LOAD CAPACITANCE AT


DIFFERENT DATA RATES


6.4


6.2


7.2


7.0


MAX220-05


LOAD CAPACITANCE (pF)


VOH (V)


500 1000 1500 2000


6.8


6.6


160kbits/sec


80kbits/sec


20kbits/sec


TA = +25°C


VCC = +5V


3 TRANSMITTERS LOADED


RL = 3kΩ


C1–C4 = 1μF


12.0


4.0


0 2500


TRANSMITTER SLEW RATE


vs. LOAD CAPACITANCE


6.0


5.0


11.0


9.0


10.0


MAX220-06


LOAD CAPACITANCE (pF)


SLEW RATE (V/μs)


500 1000 1500 2000


8.0


7.0


TA = +25°C


VCC = +5V


LOADED, RL = 3kΩ


C1–C4 = 1μF


1 TRANSMITTER LOADED


2 TRANSMITTERS


LOADED


3 TRANSMITTERS


LOADED


4 TRANSMITTERS


LOADED


-6.0


-9.0


4.5 5.5


TRANSMITTER OUTPUT


VOLTAGE (VOL) vs. VCC


-8.0


-8.5


-6.5


-7.0


MAX220-07


VCC (V)


VOL (V)


5.0


-7.5


4 TRANSMITTERS


LOADED


TA = +25°C


C1–C4 = 1μF


TRANSMITTER


LOADS =


3kΩ || 2500pF


1 TRANSMITTER


LOADED


2 TRANSMITTERS


LOADED


3 TRANSMITTERS


LOADED


-6.0


-7.6


0 2500


TRANSMITTER OUTPUT VOLTAGE (VOL)


vs. LOAD CAPACITANCE AT


DIFFERENT DATA RATES


-7.0


-7.2


-7.4


-6.2


-6.4 MAX220-08


LOAD CAPACITANCE (pF)


VOL (V)


500 1000 1500 2000


-6.6


-6.8 160kbits/sec


80kbits/sec


20Kkbits/sec


TA = +25°C


VCC = +5V


3 TRANSMITTERS LOADED


RL = 3kΩ


C1–C4 = 1μF


10


-10


0 5 10 15 20 25 30 35 40 45 50


TRANSMITTER OUTPUT VOLTAGE (V+, V-)


vs. LOAD CURRENT


-2


-6


-4


-8


8


6


MAX220-09


CURRENT (mA)


V+, V- (V)


4


2


0


V+ AND VEQUALLY


LOADED


V- LOADED,


NO LOAD


ON V+


TA = +25°C


VCC = +5V


C1–C4 = 1μF


ALL TRANSMITTERS UNLOADED


V+ LOADED,


NO LOAD


ON V-


__________________________________________Typical Operating Characteristics


MAX223/MAX230–MAX241


*SHUTDOWN POLARITY IS REVERSED


FOR NON MAX241 PARTS


V+, V- WHEN EXITING SHUTDOWN


(1μF CAPACITORS)


MAX220-13


SHDN*


VO


V+


500ms/div


Input Logic Threshold Low


MAX220MAX249


+5V-Powered, Multichannel RS-232


Drivers/Receivers


8 _______________________________________________________________________________________


ABSOLUTE MAXIMUM RATINGS—MAX225/MAX244–MAX249


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 4: Input voltage measured with transmitter output in a high-impedance state, shutdown, 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.


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


Input Voltages


TIN‚ ENA, ENB, ENR, ENT, ENRA,


ENRB, ENTA, ENTB..................................-0.3V to (VCC + 0.3V)


RIN .....................................................................................±25V


TOUT (Note 3).....................................................................±15V


ROUT ........................................................-0.3V to (VCC + 0.3V)


Short Circuit (one output at a time)


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


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


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) ...611mW


44-Pin PLCC (derate 13.33mW/°C above +70°C) ...........1.07W


Operating Temperature Ranges


MAX225C_ _, MAX24_C_ _ ..................................0°C to +70°C


MAX225E_ _, MAX24_E_ _ ...............................-40°C to +85°C


Storage Temperature Range .............................-65°C to +160°C


Lead Temperature (soldering,10sec) ..............................+300°C


VCC = 0V,


VOUT = ±15V


Tables 1a–1d μA


±0.01 ±25


Normal operation


Shutdown


Tables 1a–1d, normal operation


All transmitter outputs loaded with 3kΩ to GND


ENA, ENB, ENT, ENTA, ENTB =


VCC, VOUT = ±15V


RS-232 Input Hysteresis V


RS-232 Input Threshold Low V


Output Voltage Swing ±5 ±7.5 V


Output Leakage Current (shutdown)


±0.01 ±25


Transmitter Output Resistance VCC = V+ = V- = 0V, VOUT = ±2V (Note 4) 300 10M Ω


μA


PARAMETER


±0.05 ±0.10


MIN TYP MAX UNITS


Normal operation, outputs disabled,


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


TTL/CMOS Output Leakage Current


Shrinking VOUT = VCC 10 30


mA


Sourcing VOUT = GND -2 -10


TTL/CMOS Output Voltage High IOUT = -1.0mA 3.5 VCC - 0.2 V


TTL/CMOS Output Voltage Low IOUT = 3.2mA 0.2 0.4 V


3 5 7 kΩ


VCC = 5V 0.2 0.5 1.0


1.4 0.8 V


TTL/CMOS Output Short-Circuit Current


1.8 2.4 V


VCC = 5V 0.8 1.3


RS-232 Input Resistance


RS-232 Input Voltage Operating Range ±25 V


Output Short-Circuit Current VOUT = 0V ±7 ±30 mA


Data Rate 120 64 kbits/sec


CONDITIONS


VCC = 5V


μA


±0.01 ±1


Logic Pull-Up/lnput Current


10 50


Tables 1a–1d


RS-232 Input Threshold High


Input Logic Threshold High 2 1.4 V


RS-232 TRANSMITTERS


RS-232 RECEIVERS


MAX220MAX249


+5V-Powered, Multichannel RS-232


Drivers/Receivers


_______________________________________________________________________________________ 9


Operating Supply Voltage


4.75 5.25


V


Transmitter Enable Time


MAX225 10 20


tET


No load


MAX244–MAX249 11 30


5 10 30


MAX225 40


VCC Supply Current


(normal operation) 3kΩ loads on


all outputs MAX244–MAX249 57


mA


Transition Slew Rate


8 25


CL = 50pF to 2500pF, RL = 3kΩ to 7kΩ, VCC = 5V,


TA = +25°C, measured from +3V to -3V or -3V to +3V


TA = TMIN to TMAX


CONDITIONS


50


V/μs


MAX246–MAX249


(excludes charge-pump start-up)


Shutdown Supply Current μA


5


tPHLT 1.3 3.5


μs


tPLHT 1.5 3.5


Transmitter Disable Time, Figure 4


Transmitter Propagation Delay


TLL to RS-232 (normal operation),


Figure 1


μs


tDT 100 ns


Transmitter + to - Propagation


Delay Difference (normal operation)


tPHLT - tPLHT


MIN TYP MAX UNITS


350


PARAMETER


ns


Receiver + to - Propagation


Delay Difference (normal operation)


tPHLR - tPLHR 350 ns


MAX244–MAX249 4.5 5.5


MAX225


Leakage current ±1


Control Input Threshold low 1.4 0.8


Threshold high 2.4 1.4


V


μA


TA = +25°C


tPHLR 0.6 1.5


tPLHR 0.6 1.5


Receiver Propagation Delay


TLL to RS-232 (normal operation),


Figure 2


μs


tPHLS 0.6 10


tPLHS 3.0 10


Receiver Propagation Delay


TLL to RS-232 (low-power mode),


Figure 2


μs


Receiver-Output Enable Time, Figure 3 tER 100 500 ns


Receiver-Output Disable Time, Figure 3 tDR 100 500 ns


MAX225/MAX245–MAX249


(includes charge-pump start-up)


10 ms


POWER SUPPLY AND CONTROL LOGIC


AC CHARACTERISTICS


Note 5: 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.


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.)


MAX220MAX249


+5V-Powered, Multichannel RS-232


Drivers/Receivers


10 ______________________________________________________________________________________


__________________________________________Typical Operating Characteristics


MAX225/MAX244–MAX249


18


2


0 1 2 3 4 5


TRANSMITTER SLEW RATE


vs. LOAD CAPACITANCE


8


6


4


16


MAX220-10


LOAD CAPACITANCE (nF)


TRANSMITTER SLEW RATE (V/μs)


14


12


10


VCC = 5V


EXTERNAL POWER SUPPLY


1μF CAPACITORS


40kb/s DATA RATE


8 TRANSMITTERS


LOADED WITH 3kΩ


10


-10


0 5 10 15 20 25 30 35


OUTPUT VOLTAGE


vs. LOAD CURRENT FOR V+ AND V-


-2


-4


-6


-8


8


MAX220-11


LOAD CURRENT (mA)


OUTPUT VOLTAGE (V)


6


4


2


0


V+ AND V- LOADED


EITHER V+ OR


V- LOADED


V+ AND V- LOADED


VCC = 5V


EXTERNAL CHARGE PUMP


1μF CAPACITORS


8 TRANSMITTERS


DRIVING 5kΩ AND


2000pF AT 20kbits/sec


V- LOADED


V+ LOADED


9.0


5.0


0 1 2 3 4 5


TRANSMITTER OUTPUT VOLTAGE (V+, V-)


vs. LOAD CAPACITANCE AT


DIFFERENT DATA RATES


6.0


5.5


8.5


MAX220-12


LOAD CAPACITANCE (nF)


V+, V (V)


8.0


7.5


7.0


6.5


VCC = 5V WITH ALL TRANSMITTERS DRIVEN


LOADED WITH 5kΩ


10kb/sec


20kb/sec


40kb/sec


60kb/sec


100kb/sec


200kb/sec


ALL CAPACITIORS 1μF


MAX220MAX249


+5V-Powered, Multichannel RS-232


Drivers/Receivers


______________________________________________________________________________________ 11


INPUT


OUTPUT


+3V


V+


0V


V-


0V


tPLHT tPHLT


tPHLR


tPHLS


tPLHR


tPLHS


50%


VCC


50%


+3V


50%


INPUT


OUTPUT


*EXCEPT FOR R2 ON THE MAX243


WHERE -3V IS USED.


0V*


50%


GND


Figure 1. Transmitter Propagation-Delay Timing Figure 2. Receiver Propagation-Delay Timing


EN


RX IN


a) TEST CIRCUIT


b) ENABLE TIMING


c) DISABLE TIMING


EN INPUT


RECEIVER


OUTPUTS


RX OUT


RX


1k


0V


+3V


EN


EN


+0.8V


+3.5V


OUTPUT ENABLE TIME (tER)


VCC - 2V


VOL + 0.5V


VOH - 0.5V


OUTPUT DISABLE TIME (tDR)


VCC - 2V


+3V


0V


150pF


EN INPUT


VOH


RECEIVER


OUTPUTS


VOL


1 OR 0 TX


3k 50pF


-5V


+5V


OUTPUT DISABLE TIME (tDT)


V+


SHDN


+3V


0V


V-


0V


a) TIMING DIAGRAM


b) TEST CIRCUIT


Figure 3. Receiver-Output Enable and Disable Timing Figure 4. Transmitter-Output Disable Timing


MAX220MAX249


+5V-Powered, Multichannel RS-232


Drivers/Receivers


12 ______________________________________________________________________________________


ENT ENR OPERATION STATUS TRANSMITTERS RECEIVERS


0 0 Normal Operation All Active All Active


0 1 Normal Operation All Active All 3-State


1 0 Shutdown All 3-State All Low-Power Receive Mode


1 1 Shutdown All 3-State All 3-State


Table 1a. MAX245 Control Pin Configurations


ENT ENR


OPERATION


STATUS


TRANSMITTERS RECEIVERS


TA1–TA4 TB1–TB4 RA1–RA5 RB1–RB5


0 0 Normal Operation All Active All Active All Active All Active


0 1 Normal Operation All Active All Active


RA1–RA4 3-State,


RA5 Active


RB1–RB4 3-State,


RB5 Active


1 0 Shutdown All 3-State All 3-State


All Low-Power


Receive Mode


All Low-Power


Receive Mode


1 1 Shutdown All 3-State All 3-State


RA1–RA4 3-State,


RA5 Low-Power


Receive Mode


RB1–RB4 3-State,


RB5 Low-Power


Receive Mode


Table 1b. MAX245 Control Pin Configurations


Table 1c. MAX246 Control Pin Configurations


ENA ENB


OPERATION


STATUS


TRANSMITTERS RECEIVERS


TA1–TA4 TB1–TB4 RA1–RA5 RB1–RB5


0 0 Normal Operation All Active All Active All Active All Active


0 1 Normal Operation All Active All 3-State All Active


RB1–RB4 3-State,


RB5 Active


1 0 Shutdown All 3-State All Active


RA1–RA4 3-State,


RA5 Active


All Active


1 1 Shutdown All 3-State All 3-State


RA1–RA4 3-State,


RA5 Low-Power


Receive Mode


RB1–RB4 3-State,


RA5 Low-Power


Receive Mode


MAX220MAX249


+5V-Powered, Multichannel RS-232


Drivers/Receivers


______________________________________________________________________________________ 13


TA1–TA4 TB1–TB4 RA1–RA4 RB1–RB4


0 0 0 0 Normal Operation All Active All Active All Active All Active


0 0 0 1 Normal Operation All Active All Active All Active


All 3-State, except


RB5 stays active on


MAX247


0 0 1 0 Normal Operation All Active All Active All 3-State All Active


0 0 1 1 Normal Operation All Active All Active All 3-State


All 3-State, except


RB5 stays active on


MAX247


0 1 0 0 Normal Operation All Active All 3-State All Active All Active


0 1 0 1 Normal Operation All Active All 3-State All Active


All 3-State, except


RB5 stays active on


MAX247


0 1 1 0 Normal Operation All Active All 3-State All 3-State All Active


0 1 1 1 Normal Operation All Active All 3-State All 3-State


All 3-State, except


RB5 stays active on


MAX247


1 0 0 0 Normal Operation All 3-State All Active All Active All Active


1 0 0 1 Normal Operation All 3-State All Active All Active


All 3-State, except


RB5 stays active on


MAX247


1 0 1 0 Normal Operation All 3-State All Active All 3-State All Active


1 0 1 1 Normal Operation All 3-State All Active All 3-State


All 3-State, except


RB5 stays active on


MAX247


1 1 0 0 Shutdown All 3-State All 3-State


Low-Power


Receive Mode


Low-Power


Receive Mode


1 1 0 1 Shutdown All 3-State All 3-State


Low-Power


Receive Mode


All 3-State, except


RB5 stays active on


MAX247


1 1 1 0 Shutdown All 3-State All 3-State All 3-State


Low-Power


Receive Mode


1 1 1 1 Shutdown All 3-State All 3-State All 3-State


All 3-State, except


RB5 stays active on


MAX247


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


MAX248


OPERATION


ENRB STATUS


MAX247 TA1–TA4 TB1–TB4 RA1–RA4 RB1–RB5


TRANSMITTERS


ENTA ENTB ENRA


MAX249 TA1–TA3 TB1–TB3 RA1–RA5 RB1–RB5


RECEIVERS


MAX220MAX249


_______________Detailed Description


The MAX220MAX249 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 MAX220MAX249 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


where a +10V external supply is applied to the V+


pin (instead of using the internal charge pump to generate


+10V), the C1 capacitor must not be installed and


the SHDN pin must be tied to VCC. This is because V+


is internally connected to VCC in shutdown mode.


RS-232 Drivers


The typical driver output voltage swing is ±8V when


loaded with a nominal 5kΩ RS-232 receiver and VCC =


+5V. Output swing is guaranteed to meet the EIA/TIA-


232E and V.28 specification, which calls for ±5V minimum


driver output levels under worst-case conditions.


These include a minimum 3kΩ load, VCC = +4.5V, and


maximum operating temperature. Unloaded driver output


voltage ranges 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 pull-up resistors to VCC are built in


(except for the MAX220). The pull-up resistors force the


outputs of unused drivers low because all drivers invert.


The internal input pull-up resistors typically source 12μA,


except in shutdown mode where the pull-ups are disabled.


Driver outputs turn off and enter a high-impedance


state—where 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 pull-up resistors to force the


ouputs 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 threestate


control on the receiver outputs.


The receiver TTL/CMOS outputs are in a high-impedance,


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 with


1kΩ series impedance. The transmitter is also zener


clamped to approximately VCC + 6V, with a series


impedance of 1kΩ.


The driver output slew rate is limited to less than 30V/μs


as required by the EIA/TIA-232E and V.28 specifications.


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.


The receiver inputs withstand an input overvoltage up


to ±25V and provide input terminating resistors with


+5V-Powered, Multichannel RS-232


Drivers/Receivers


nominal 5kΩ values. The receivers implement Type 1


interpretation 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 output


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 shutdown


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 activate 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, differing


only in that RS-232 cable fault protection is removed


on one of the two receiver inputs. This means that control


lines such as CTS and RTS can either be driven or left


floating 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 floating‚


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.


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


receivers‚ 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 lowpower


receive (enabled receivers continue to function


at lower data rates). The receiver enable inputs control


the full-speed receive and three-state modes. The


transmitters have two modes of operation: full-speed


transmit (normal active) and three-state (disabled). The


transmitter 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.


MAX220MAX249


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 transmitters


go into a three-state mode with a logic high on


both ENTA and ENTB.


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


20kbits/sec.


Applications Information


Figures 5 through 25 show pin configurations and typical


operating circuits. In applications that are sensitive


to power-supply noise, VCC should be decoupled to


ground with a capacitor of the same value as C1 and


C2 connected as close as possible to the device.


+5V-Powered, Multichannel RS-232


MAX220MAX249


+5V-Powered, Multichannel RS-232


Figure 5. MAX220/MAX232/MAX232A Pin Configuration and Typical Operating Circuit


Figure 6. MAX222/MAX242 Pin Configurations and Typical Operating Circuit


MAX220MAX249


+5V-Powered, Multichannel RS-232


Drivers/Receivers


PINS (ENR, GND, VCC, T5OUT) ARE INTERNALLY CONNECTED.


CONNECT EITHER OR BOTH EXTERNALLY. T5OUT IS A SINGLE DRIVER.


GND


TOP VIEW


Figure 7. MAX225 Pin Configuration and Typical Operating Circuit


MAX220MAX249


+5V-Powered, Multichannel RS-232


Figure 10. MAX231 Pin Configurations and Typical Operating Circuit


MAX220MAX249


+5V-Powered, Multichannel RS-232


VFigure


14. MAX236 Pin Configuration and Typical Operating Circuit


MAX220MAX249


+5V-Powered, Multichannel RS-232


Drivers/Receivers


24 Figure 19. MAX243 Pin Configuration and Typical Operating Circuit


MAX220MAX249


+5V-Powered, Multichannel RS-232


MAX245 FUNCTIONAL DESCRIPTION


10 RECEIVERS


5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE)


5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE)


8 TRANSMITTTERS


4 A-SIDE TRANSMITTERS


2 CONTROL PINS


1 RECEIVER ENABLE (ENR)


1 TRANSMITTER ENABLE (ENT)


ENR ENT 39


Figure 21. MAX245 Pin Configuration and Typical Operating Circuit


MAX220MAX249


+5V-Powered, Multichannel RS-232


Drivers/Receivers 31


MAX246 FUNCTIONAL DESCRIPTION


10 RECEIVERS


5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE)


5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE)


8 TRANSMITTERS


4 A-SIDE TRANSMITTERS


4 B-SIDE TRANSMITTERS


2 CONTROL PINS


ENABLE A-SIDE (ENA)


ENABLE B-SIDE (ENB)


ENA ENB


Figure 22. MAX246 Pin Configuration and Typical Operating Circuit


MAX220MAX249


+5V-Powered, Multichannel RS-232


ENRA ENRB


MAX247 FUNCTIONAL DESCRIPTION


9 RECEIVERS


4 A-SIDE RECEIVERS


5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE)


8 TRANSMITTERS


4 A-SIDE TRANSMITTERS


4 B-SIDE TRANSMITTERS


4 CONTROL PINS


ENABLE RECEIVER A-SIDE (ENRA)


ENABLE RECEIVER B-SIDE (ENRB)


ENABLE RECEIVER A-SIDE (ENTA)


ENABLE RECEIVERr B-SIDE (ENTB)


Figure 23. MAX247 Pin Configuration and Typical Operating Circuit


MAX220MAX249


Figure 24. MAX248 Pin Configuration and Typical Operating Circuit


MAX220MAX249


+5V-Powered, Multichannel RS-232


Drivers/Receivers


Figure 25. MAX249 Pin Configuration and Typical Operating Circuit


MAX220MAX249


+5V-Powered, Multichannel RS-232


Drivers/Receivers


Ordering Information (continued)


PART


MAX222CPN 0°C to +70°C


TEMP. RANGE PIN-PACKAGE


18 Plastic DIP


MAX222CWN 0°C to +70°C 18 Wide SO


MAX222C/D 0°C to +70°C Dice*


MAX222EPN -40°C to +85°C 18 Plastic DIP


MAX222EWN -40°C to +85°C 18 Wide SO


MAX222EJN -40°C to +85°C 18 CERDIP


MAX222MJN -55°C to +125°C 18 CERDIP


MAX223CAI 0°C to +70°C 28 SSOP


MAX223CWI 0°C to +70°C 28 Wide SO


MAX223C/D 0°C to +70°C Dice*


MAX223EAI -40°C to +85°C 28 SSOP


MAX223EWI -40°C to +85°C 28 Wide SO


MAX225CWI 0°C to +70°C 28 Wide SO


MAX225EWI -40°C to +85°C 28 Wide SO


MAX230CPP 0°C to +70°C 20 Plastic DIP


MAX230CWP 0°C to +70°C 20 Wide SO


MAX230C/D 0°C to +70°C Dice*


MAX230EPP -40°C to +85°C 20 Plastic DIP


MAX230EWP -40°C to +85°C 20 Wide SO


MAX230EJP -40°C to +85°C 20 CERDIP


MAX230MJP -55°C to +125°C 20 CERDIP


MAX231CPD 0°C to +70°C 14 Plastic DIP


MAX231CWE 0°C to +70°C 16 Wide SO


MAX231CJD 0°C to +70°C 14 CERDIP


MAX231C/D 0°C to +70°C Dice*


MAX231EPD -40°C to +85°C 14 Plastic DIP


MAX231EWE -40°C to +85°C 16 Wide SO


MAX231EJD -40°C to +85°C 14 CERDIP


MAX231MJD -55°C to +125°C 14 CERDIP


MAX232CPE 0°C to +70°C 16 Plastic DIP


MAX232CSE 0°C to +70°C 16 Narrow SO


MAX232CWE 0°C to +70°C 16 Wide SO


MAX232C/D 0°C to +70°C Dice*


MAX232EPE -40°C to +85°C 16 Plastic DIP


MAX232ESE -40°C to +85°C 16 Narrow SO


MAX232EWE -40°C to +85°C 16 Wide SO


MAX232EJE -40°C to +85°C 16 CERDIP


MAX232MJE -55°C to +125°C 16 CERDIP


MAX232MLP -55°C to +125°C 20 LCC


MAX232ACPE 0°C to +70°C 16 Plastic DIP


MAX232ACSE 0°C to +70°C 16 Narrow SO


MAX232ACWE 0°C to +70°C 16 Wide SO


MAX232AC/D


MAX232AEPE -40°C to +85°C 16 Plastic DIP


MAX232AESE


0°C to +70°C Dice*


-40°C to +85°C 16 Narrow SO


MAX232AEWE -40°C to +85°C 16 Wide SO


MAX232AEJE -40°C to +85°C 16 CERDIP


MAX232AMJE -55°C to +125°C 16 CERDIP


MAX232AMLP -55°C to +125°C 20 LCC


MAX233CPP 0°C to +70°C 20 Plastic DIP


MAX233EPP -40°C to +85°C 20 Plastic DIP


MAX233ACPP 0°C to +70°C 20 Plastic DIP


MAX233ACWP 0°C to +70°C 20 Wide SO


MAX233AEPP -40°C to +85°C 20 Plastic DIP


MAX233AEWP -40°C to +85°C 20 Wide SO


MAX234CPE 0°C to +70°C 16 Plastic DIP


MAX234CWE 0°C to +70°C 16 Wide SO


MAX234C/D 0°C to +70°C Dice*


MAX234EPE -40°C to +85°C 16 Plastic DIP


MAX234EWE -40°C to +85°C 16 Wide SO


MAX234EJE -40°C to +85°C 16 CERDIP


MAX234MJE -55°C to +125°C 16 CERDIP


MAX235CPG 0°C to +70°C 24 Wide Plastic DIP


MAX235EPG -40°C to +85°C 24 Wide Plastic DIP


MAX235EDG -40°C to +85°C 24 Ceramic SB


MAX235MDG -55°C to +125°C 24 Ceramic SB


MAX236CNG 0°C to +70°C 24 Narrow Plastic DIP


MAX236CWG 0°C to +70°C 24 Wide SO


MAX236C/D 0°C to +70°C Dice*


MAX236ENG -40°C to +85°C 24 Narrow Plastic DIP


MAX236EWG -40°C to +85°C 24 Wide SO


MAX236ERG -40°C to +85°C 24 Narrow CERDIP


MAX236MRG -55°C to +125°C 24 Narrow CERDIP


MAX237CNG 0°C to +70°C 24 Narrow Plastic DIP


MAX237CWG 0°C to +70°C 24 Wide SO


MAX237C/D 0°C to +70°C Dice*


MAX237ENG -40°C to +85°C 24 Narrow Plastic DIP


MAX237EWG -40°C to +85°C 24 Wide SO


MAX237ERG -40°C to +85°C 24 Narrow CERDIP


MAX237MRG -55°C to +125°C 24 Narrow CERDIP


MAX238CNG 0°C to +70°C 24 Narrow Plastic DIP


MAX238CWG 0°C to +70°C 24 Wide SO


MAX238C/D 0°C to +70°C Dice*


MAX238ENG -40°C to +85°C 24 Narrow Plastic DIP


* Contact factory for dice specifications.


MAX220MAX249


+5V-Powered, Multichannel RS-232


Drivers/Receivers


___________________________________________Ordering Information (continued)


* Contact factory for dice specifications.


MAX242MJN -55°C to +125°C 18 CERDIP


MAX242EJN -40°C to +85°C 18 CERDIP


MAX242EWN -40°C to +85°C 18 Wide SO


MAX242EPN -40°C to +85°C 18 Plastic DIP


MAX242C/D 0°C to +70°C Dice*


MAX242CWN 0°C to +70°C 18 Wide SO


MAX242CPN 0°C to +70°C 18 Plastic DIP


MAX242CAP 0°C to +70°C 20 SSOP


MAX241EWI -40°C to +85°C 28 Wide SO


MAX241EAI -40°C to +85°C 28 SSOP


MAX241C/D 0°C to +70°C Dice*


MAX241CWI 0°C to +70°C 28 Wide SO


MAX241CAI 0°C to +70°C 28 SSOP


MAX240C/D 0°C to +70°C Dice*


MAX240CMH 0°C to +70°C 44 Plastic FP


MAX239MRG -55°C to +125°C 24 Narrow CERDIP


MAX239ERG -40°C to +85°C 24 Narrow CERDIP


MAX239EWG -40°C to +85°C 24 Wide SO


MAX239ENG -40°C to +85°C 24 Narrow Plastic DIP


MAX239C/D 0°C to +70°C Dice*


MAX239CWG 0°C to +70°C 24 Wide SO


MAX239CNG 0°C to +70°C 24 Narrow Plastic DIP


-55°C to +125°C 24 Narrow CERDIP


24 Wide SO


TEMP. RANGE PIN-PACKAGE


-40°C to +85°C


MAX238MRG


MAX238ERG -40°C to +85°C 24 Narrow CERDIP


MAX238EWG


PART


MAX249EQH -40°C to +85°C 44 PLCC


MAX249CQH 0°C to +70°C 44 PLCC


MAX248EQH -40°C to +85°C 44 PLCC


MAX248C/D 0°C to +70°C Dice*


MAX248CQH 0°C to +70°C 44 PLCC


MAX247EPL -40°C to +85°C 40 Plastic DIP


MAX247C/D 0°C to +70°C Dice*


MAX247CPL 0°C to +70°C 40 Plastic DIP


MAX246EPL -40°C to +85°C 40 Plastic DIP


MAX246C/D 0°C to +70°C Dice*


MAX246CPL 0°C to +70°C 40 Plastic DIP


MAX245EPL -40°C to +85°C 40 Plastic DIP


MAX245C/D 0°C to +70°C Dice*


MAX245CPL 0°C to +70°C 40 Plastic DIP


MAX244EQH -40°C to +85°C 44 PLCC


MAX244C/D 0°C to +70°C Dice*


MAX244CQH 0°C to +70°C 44 PLCC


MAX243MJE -55°C to +125°C 16 CERDIP


MAX243EJE -40°C to +85°C 16 CERDIP


MAX243EWE -40°C to +85°C 16 Wide SO


MAX243ESE -40°C to +85°C 16 Narrow SO


MAX243EPE -40°C to +85°C 16 Plastic DIP


MAX243C/D 0°C to +70°C Dice*


0°C to +70°C 16 Wide SO


0°C to +70°C 16 Plastic DIP


MAX243CWE


MAX243CSE 0°C to +70°C 16 Narrow SO


MAX243CPE


Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are


implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.


36 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600


© 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.MAX232CPE is the number for products that is related with integrated circuit.