a EMI/EMC Compliant, ؎15 kV ESD Protected,
RS-232 Line Drivers/Receivers
ADM202E/ADM1181A
FEATURES
FUNCTIO NAL BLO CK D IAGRAMS
Com plies w ith 89/ 336/ EEC EMC Directive
ESD Protection to IEC1000-4-2 (801.2)
؎8 kV: Contact Discharge
؎15 kV: Air-Gap Discharge
؎15 kV: Hum an Body Model
EFT Fast Transient Burst Im m unity (IEC1000-4-4)
Low EMI Em issions (EN55022)
230 kbits/ s Data Rate Guaranteed
TSSOP Package Option
+5V INPUT
+5V TO +10V
VOLTAGE
DOUBLER
1
3
16
2
V
C1+
C1–
CC
0.1µF
10V
C3
0.1µF
6.3V
C5
0.1µF
V+
4
5
+10V TO –10V
VOLTAGE
INVERTER
6
C2+
C2–
V–
0.1µF
10V
C4
0.1µF
10V
14
7
11
10
12
T1
T2
T1
T1
T2
OUT
IN
EIA/TIA-232
OUTPUTS
CMOS
INPUTS
T2
Upgrade for MAX202E, 232E, LT1181A
OUT
IN
APPLICATIONS
13
8
R1
R2
R1
R2
R1
IN
IN
OUT
OUT
CMOS
OUTPUTS
EIA/TIA-232
General Purpose RS-232 Data Link
Portable Instrum ents
PDAs
INPUTS
*
9
R2
ADM202E
GND
15
GENERAL D ESCRIP TIO N
NOTE
*
INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
T he ADM202E and ADM1181A are robust, high speed, 2-
channel RS232/V.28 interface devices that operate from a single
+5 V power supply. Both products are suitable for operation in
harsh electrical environments and are compliant with the EU di-
rective on EMC (89/336/EEC). Both the level of electromag-
netic emissions and immunity are in compliance. EM immunity
includes ESD protection in excess of ±15 kV on all I/O lines,
Fast T ransient burst protection (1000-4-4) and Radiated Im-
munity (1000-4-3). EM emissions include radiated and
conducted emissions as required by Information T echnology
Equipment EN55022, CISPR22.
+5V INPUT
+5V TO +10V
VOLTAGE
DOUBLER
1
3
16
2
V
C1+
C1–
CC
0.1µF
10V
C5
0.1µF
10V
V+
C3
0.1µF
10V
4
5
+10V TO –10V
VOLTAGE
INVERTER
6
C2+
C2–
V–
0.1µF
10V
C4
0.1µF
10V
14
7
11
10
12
T1
T2
T1
T1
T2
OUT
IN
EIA/TIA-232
OUTPUTS
CMOS
INPUTS
T2
OUT
IN
T he ADM202E and ADM1181A conform to the EIA-232E and
CCIT T V.28 specifications and operate at data rates up to
230 kbps.
13
8
R1
R2
R1
R2
R1
IN
IN
OUT
OUT
CMOS
OUTPUTS
EIA/TIA-232
INPUTS
*
9
R2
Four external 0.1 µF charge pump capacitors are used for the
voltage doubler/inverter permitting operation from a single +5 V
supply.
ADM1181A
GND
15
T he ADM202E provides a robust pin-compatible upgrade for
existing ADM202, ADM232L or MAX202E/MAX232E sock-
ets. It is available in a 16-pin DIP, wide and narrow SO and also
a space saving T SSOP package. T he T SSOP package gives a
44% space saving over SOIC.
NOTE
*INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
O RD ERING GUID E
Model
Tem perature Range
P ackage O ption
T he ADM1181A provides a robust pin compatible upgrade for
the LT C1181A, and it is available in 16-pin DIP and 16-lead
SO packages.
ADM202EAN
ADM202EARW
ADM202EARN
ADM202EARU
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
N-16
R-16W
R-16N
RU-16
ADM1181AAN
ADM1181AARW
–40°C to +85°C
–40°C to +85°C
N-16
R-16W
REV. 0
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reliable. However, no responsibility is assum ed by Analog Devices for its
use, nor for any infringem ents of patents or other rights of third parties
which m ay result from its use. No license is granted by im plication or
otherwise under any patent or patent rights of Analog Devices.
© Analog Devices, Inc., 1996
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