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ADM236LANN/a1avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM236LARADIN/a602avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM234LJRN/a7avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM235LANN/a55avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM235LJNADI N/a29avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM230LANADN/a109avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM230LARN/a32avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM230LJRADN/a210avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM230LJRN/a61avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM231LARADN/a67avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM231LJNADN/a2avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM231LJRADIN/a19avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM232LANADIN/a450avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM232LANADN/a160avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM232LAQADN/a54avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM232LARADN/a1924avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM232LJNADN/a213avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM232LJRAD ?N/a1736avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM233LANADN/a174avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM233LJNADIN/a13avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM234LANADN/a31avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM234LARADN/a26avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM234LJNADN/a199avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM234LJRADN/a27avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM236LJNADN/a18avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM236LJRN/a26avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM237LANADN/a77avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM237LARADIN/a23avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM237LJNADN/a13163avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM237LJRN/a1170avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM238LANN/a4avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM238LARADIN/a17avai+5 V Powered CMOS RS-232 Drivers/Receivers
ADM238LJNADN/a989avai+5 V Powered CMOS RS-232 Drivers/Receivers
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ADM241LJRSADN/a1701avai+5 V Powered CMOS RS-232 Drivers/Receivers


ADM237LJN ,+5 V Powered CMOS RS-232 Drivers/ReceiversSpecifications120 kB/s Data Rate1 16C1+ +5V TO +10V VCCOn-Board DC-DC Converters 1m F 1m F 1m FVOLT ..
ADM237LJR ,+5 V Powered CMOS RS-232 Drivers/ReceiversGENERAL DESCRIPTION All members of the ADM230L family, except the ADM231LThe ADM2xx family of line ..
ADM237LJR-REEL , 5 V-Powered CMOS RS-232 Drivers/Receivers
ADM238L ,Low Power, +5V CMOS RS-232 100kBPS Transceiver with 4 Drivers and 4 ReceiversSpecifications subject to change without notice.ABSOLUTE MAXIMUM RATINGS* Thermal Impedance, θJA(T ..
ADM238LAN ,+5 V Powered CMOS RS-232 Drivers/ReceiversSPECIFICATIONS32L, 34L, 36L, 38L, 39L, 41L);V = +5 V 6 5% (ADM230L, 33L, 35L, 37L); V+ = 7.5 V to 1 ..
ADM238LAR ,+5 V Powered CMOS RS-232 Drivers/ReceiversSpecifications120 kB/s Data Rate1 16C1+ +5V TO +10V VCCOn-Board DC-DC Converters 1m F 1m F 1m FVOLT ..
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ADM230LAN-ADM230LAR-ADM230LJR-ADM231LAR-ADM231LJN-ADM231LJR-ADM232LAN-ADM232LAQ-ADM232LAR-ADM232LJN-ADM232LJR-ADM233LAN-ADM233LJN-ADM234LAN-ADM234LAR-ADM234LJN-ADM234LJR-ADM235LAN-ADM235LJN-ADM236LAN-ADM236LAR-ADM236LJN-ADM236LJR-ADM237LAN-ADM237LA
+5 V Powered CMOS RS-232 Drivers/Receivers
REV.0+5 V Powered
CMOS RS-232 Drivers/Receivers
ADM232L TYPICAL OPERATING CIRCUIT
Table I. Selection Table
FEATURES
Single 5 V Power Supply
Meets All EIA-232-E and V.28 Specifications
120 kB/s Data Rate
On-Board DC-DC Converters

69 V Output Swing with +5 V Supply
Small 1 mF Capacitors
Low Power Shutdown ≤1 mA
Receivers Active in Shutdown (ADM223)
ESD > 2 kV

630 V Receiver Input Levels
Latch-Up FREE
Plug-In Upgrade for MAX223/230-241
Plug-In Upgrade for AD230–AD241
APPLICATIONS
Computers
Peripherals
Modems
Printers
Instruments
GENERAL DESCRIPTION

The ADM2xx family of line drivers/receivers is intended for all
EIA-232-E and V.28 communications interfaces, especially in
applications where ±12 V is not available. The ADM223,
ADM230L, ADM235L, ADM236L and ADM241L feature a
low power shutdown mode that reduces power dissipation to
less than 5 μW, making them ideally suited for battery powered
equipment. Two receivers remain enabled during shutdown on
the ADM223. The ADM233L and ADM235L do not require
any external components and are particularly useful in applica-
tions where printed circuit board space is critical.
All members of the ADM230L family, except the ADM231L
and the ADM239L, include two internal charge pump voltage
converters that allow operation from a single +5 V supply.
These converters convert the +5 V input power to the ±10 V
required for RS-232 output levels. The ADM231L and
ADM239L are designed to operate from +5 V and +12 V sup-
plies. An internal +12 V to –12 V charge pump voltage con-
verter generates the –12 V supply.
The ADM2xxL is an enhanced upgrade for the AD2xx family
featuring lower power consumption, faster slew rate and opera-
tion with smaller (1 μF) capacitors.
*INTERNAL 400kW PULL-UP RESISTOR ON EACH TTL/CMOS INPUT
**INTERNAL 5kW PULL-DOWN RESISTOR ON EACH RS-232 INPUT
+5V INPUTF6.3VF16VF
6.3VINRS-232OUTPUTSTTL/CMOS
INPUTS*
T2IN
R1OUT
TTL/CMOS
OUTPUTSRS-232
INPUTS**
ADM223/ADM230L–ADM241L–SPECIFICATIONS
VCC = +5 V 6 5% (ADM230L, 33L, 35L, 37L); V+ = 7.5 V to 13.2 V (ADM231L & ADM239L); C1–C4 = 1.0 mF Ceramic. All Specifications TMIN to
TMAX unless otherwise noted.)

NOTESample tested to ensure compliance.
Specifications subject to change without notice.
Thermal Impedance, θJA
N-14 DIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140°C/W
N-16 DIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135°C/W
N-20 DIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125°C/W
N-24 DIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120°C/W
N-24A DIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110°C/W
R-16 SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105°C/W
R-20 SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105°C/W
R-24 SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85°C/W
R-28 SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80°C/W
RS-28 SSOP . . . . . . . . . . . . . . . . . . . . . . . . . . . .100°C/W
Q-14 Cerdip . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105°C/W
Q-16 Cerdip . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100°C/W
Q-20 Cerdip . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100°C/W
Q-24 Cerdip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55°C/W
D-24 Ceramic . . . . . . . . . . . . . . . . . . . . . . . . . . . .50°C/W
Operating Temperature Range
Commercial (J Version) . . . . . . . . . . . . . . . . . . .0 to +70°C
Industrial (A Version) . . . . . . . . . . . . . . . .–40°C to +85°C
Storage Temperature Range . . . . . . . . . . .–65°C to + 150°C
Lead Temperature, Soldering . . . . . . . . . . . . . . . . . .+300°C
Vapour Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . .+215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . .+220°C
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>2000 V
*This is a stress rating only and functional operation of the device at these or any
VCC = +5 V 6 10% (ADM223, 31L,
32L, 34L, 36L, 38L, 39L, 41L);
ABSOLUTE MAXIMUM RATINGS*

(TA = 25°C unless otherwise noted)
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .–0.3 V to +6 V . . . . . . . . . . . . . . . . . . . . . . . . . . . .(VCC – 0.3 V) to +14 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+0.3 V to –14 V
Input Voltages
TIN . . . . . . . . . . . . . . . . . . . . . . . . .–0.3 V to (VCC + 0.3 V)
RIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±30 V
Output Voltages
TOUT . . . . . . . . . . . . . . . . . .(V+, + 0.3 V) to (V–, – 0.3 V)
ROUT . . . . . . . . . . . . . . . . . . . . . . .–0.3 V to (VCC + 0.3 V)
Short Circuit Duration
TOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Continuous
Power Dissipation
N-14 DIP (Derate 10 mW/°C above +70°C) . . . . .800 mW
N-16 DIP (Derate 10.5 mW/°C above +70°C) . . .840 mW
N-20 DIP (Derate 11 mW/°C above +70°C) . . . . .890 mW
N-24 DIP (Derate 13.5 mW/°C above +70°C) . .1000 mW
N-24A DIP (Derate 13.5 mW/°C above +70°C) . .500 mW
R-16 SOIC (Derate 9 mW/°C above +70°C) . . . . .760 mW
R-20 SOIC (Derate 9.5 mW/°C above +70°C) . . .800 mW
R-24 SOIC (Derate 12 mW/°C above +70°C) . . . .850 mW
R-28 SOIC (Derate 12.5 mW/°C above +70°C) . .900 mW
RS-28 SSOP (Derate 10 mW/°C above +70°C) . . .900 mW
Q-14 Cerdip (Derate 10 mW/°C above +70°C) . . .720 mW
ORDERING GUIDE
ADM232LAN
ADM232LAR
ADM232LAQ
ADM235L

ADM235LJN
ADM235LAN
ADM235LAQ
ADM238L

ADM238LJN
ADM238LJR
ADM238LAN
ADM238LAR
*D = Ceramic DIP; N = Plastic DIP; Q = Cerdip; R = Small Outline IC (SOIC); RS = Small Shrink Outline Package (SSOP).
CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000V readily
accumulate on the human body and test equipment and can discharge without detection. Although
the ADM223/ADM230L–ADM241L features proprietary ESD protection circuitry, permanent
damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper
ESD precautions are recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
ADM223/ADM230L–ADM241LT1IN
T2IN
T3IN
T4IN
T5INT1OUT
T2OUT
T3OUTT4OUT
T5OUT
VCC
C1+
C1–C2+
C2–
GND
NC = NO CONNECT

Figure 1.ADM230L DIP/SOIC Pin Configuration1µF
16V
+5V INPUT
T1INSD
RS-232
OUTPUTS
TTL/CMOS
INPUTS*
1µF
6.3V
1µF
16V
T1OUT
*INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT
T2IN
T3IN
T4IN
T5IN
T5OUT
1µF

Figure 2.ADM230L Typical Operating Circuit
Figure 3.ADM231L DIP & SOIC Pin Configurations
SOIC
DIP

Figure 4.ADM231L Typical Operating Circuit (DIP Pinout)
*INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT
**INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
1µF
16V
+5V INPUT
1µF
6.3V
1µF
16V
1µF
6.3V
T1IN
RS-232
OUTPUTS
TTL/CMOS
INPUTS*
T1OUT
T2IN
R1OUT
R2OUT
T2OUT
R1IN
R2IN
TTL/CMOS
OUTPUTS
RS-232
INPUTS**

Figure 6.ADM232L Typical Operating Circuit
*INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT
**INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
+5V INPUT
T1IN
RS-232
OUTPUTS
TTL/CMOS
INPUTS*
T1OUT
T2IN
R1OUT
R2OUT
T2OUT
R1IN
R2IN
TTL/CMOS
OUTPUTS
RS-232
INPUTS**
DO NOT MAKE
CONNECTIONS TO
THESE PINS
INTERNAL
–10V POWER
SUPPLY
INTERNAL
+10V POWER
SUPPLY

Figure 8.ADM233L Typical Operating Circuit
Figure 7.ADM233L DIP Pin Configuration
Figure 5.ADM232L DIP/SOIC Pin Configuration
ADM223/ADM230L–ADM241L
T1INSD
RS-232
OUTPUTS
TTL/CMOS
INPUTS*
T1OUT
T2IN
T3IN
T4IN
T5IN
T2OUT
T3OUT
T4OUT
T5OUT
RS-232
INPUTS**
TTL/CMOS
OUTPUTS
R1OUTR1IN
R2IN
R3IN
R4IN
R5IN
R2OUT
R3OUT
R4OUT
R5OUT
*INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT
**INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
+5V INPUT

Figure 12.ADM235L Typical Operating Circuit
+5V INPUT
T1INTTL/CMOS
INPUTS*
1µF
6.3V
1µF
16V
*INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT
T2IN
T3IN
T4IN
1µF

Figure 10.ADM234L Typical Operating Circuit
TOP VIEW
(Not to Scale)
ADM234LT1INT3IN
T3OUT
VCC
GND
T2INT4IN
T1OUT
T4OUT
C1+
C1–
C2–
C2+
T2OUT

Figure 9.ADM234L DIP/SOIC Pin Configuration
Figure 11.ADM235L DIP Pin Configuration
T1IN
TTL/CMOS
INPUTS*
T2IN
T3IN
T4IN
TTL/CMOS
OUTPUTS
R1OUT
R2OUT
R3OUT
*INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT
**INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
+5V INPUT
1µF
6.3V
1µF
16V
1µF

Figure 14.ADM236L Typical Operating Circuit
T1IN
RS-232
OUTPUTS
TTL/CMOS
INPUTS*
T1OUT
T2IN
T3IN
T4IN
T2OUT
T3OUT
T4OUT
RS-232
INPUTS**
TTL/CMOS
OUTPUTS
R1IN
R2IN
R3IN
R1OUT
R2OUT
R3OUT
*INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT
**INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT1µF
16V
+5V INPUT
1µF
6.3V
1µF
16V
T5INT5OUT
1µF

Figure 13.ADM236L DIP/SOIC Pin Configuration
Figure 15.ADM237L DIP/SOIC Pin Configuration
ADM223/ADM230L–ADM241L
T1IN
RS-232
OUTPUTS
TTL/CMOS
INPUTS*
T1OUT
T2IN
T3IN
T4IN
T2OUT
T3OUT
T4OUT
RS-232
INPUTS**
TTL/CMOS
OUTPUTS
R1IN
R2IN
R3IN
R1OUT
R2OUT
R3OUT
*INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT
**INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT1µF
16V
+5V INPUT
1µF
6.3V
1µF
16V
R4INR4OUT
1µF

Figure 18.ADM238L Typical Operating Circuit
T1INNC
RS-232
OUTPUTS
TTL/CMOS
INPUTS*
T1OUT
T2IN
T3IN
T2OUT
T3OUT
RS-232
INPUTS**
TTL/CMOS
OUTPUTSR3IN
R4IN
R5IN
R3OUT
R4OUT
R5OUT
*INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT
**INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
+5V INPUT
1µF
16V
+7.5V TO +13.2V
INPUT
R1IN
R2IN
R1OUT
R2OUT

Figure 17.ADM238L DIP/SOIC Pin Configuration
Figure 19.ADM239L DIP/SOIC Pin Configuration
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