a
EMI/EMC Compliant, 15 kV ESD Protected,
RS-232 Line Drivers/Receivers
ADM202E/ADM1181A
FUNCTIONAL BLOCK DIAGRAMS
+5V INPUT
0.1µF
10V
0.1µF
10V
+5V TO +10V V
CC 16
VOLTAGE
3
C1–
V+
2
DOUBLER
1
C1+
4
C2+
FEATURES
Complies with 89/336/EEC EMC Directive
ESD Protection to IEC1000-4-2 (801.2)
8 kV: Contact Discharge
15 kV: Air-Gap Discharge
15 kV: Human Body Model
EFT Fast Transient Burst Immunity (IEC1000-4-4)
Low EMI Emissions (EN55022)
230 kbits/s Data Rate Guaranteed
TSSOP Package Option
Upgrade for MAX202E, 232E, LT1181A
APPLICATIONS
General Purpose RS-232 Data Link
Portable Instruments
PDAs
C3
0.1µF
6.3V
C4
0.1µF
10V
T1
OUT
C5
0.1µF
+10V TO –10V V–
6
VOLTAGE
5
C2–
INVERTER
T1
T2
14
T1
IN
CMOS
INPUTS
T2
IN
R1
OUT
R2
OUT
11
10
7
EIA/TIA-232
OUTPUTS
T2
OUT
R1
IN
R2
IN
EIA/TIA-232
INPUTS
*
12
R1
13
CMOS
OUTPUTS
9
R2
8
GND
15
ADM202E
GENERAL DESCRIPTION
The 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 Transient burst protection (1000-4-4) and Radiated Im-
munity (1000-4-3). EM emissions include radiated and
conducted emissions as required by Information Technology
Equipment EN55022, CISPR22.
The ADM202E and ADM1181A conform to the EIA-232E and
CCITT V.28 specifications and operate at data rates up to
230 kbps.
Four external 0.1
µF
charge pump capacitors are used for the
voltage doubler/inverter permitting operation from a single +5 V
supply.
The 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 TSSOP package. The TSSOP package gives a
44% space saving over SOIC.
The ADM1181A provides a robust pin compatible upgrade for
the LTC1181A, and it is available in 16-pin DIP and 16-lead
SO packages.
NOTE
*
INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
+5V INPUT
0.1µF
10V
0.1µF
10V
+5V TO +10V V
CC 16
VOLTAGE
3
C1–
V+
2
DOUBLER
1
C1+
4
C2+
+10V TO –10V V–
6
VOLTAGE
5
C2–
INVERTER
T1
T2
14
C4
0.1µF
10V
T1
OUT
C3
0.1µF
10V
C5
0.1µF
10V
T1
IN
CMOS
INPUTS
T2
IN
R1
OUT
R2
OUT
11
10
7
EIA/TIA-232
OUTPUTS
T2
OUT
R1
IN
R2
IN
EIA/TIA-232
INPUTS
*
12
R1
13
CMOS
OUTPUTS
9
R2
8
GND
15
ADM1181A
NOTE
*
INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
ORDERING GUIDE
Model
ADM202EAN
ADM202EARW
ADM202EARN
ADM202EARU
ADM1181AAN
ADM1181AARW
Temperature Range
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Package Option
N-16
R-16W
R-16N
RU-16
N-16
R-16W
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
© Analog Devices, Inc., 1996
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
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