adm3232e Analog Devices, Inc., adm3232e Datasheet
adm3232e
Manufacturer Part Number
adm3232e
Description
?15 Kv Esd Protected, 3.3 V, Rs-232 Line Driver/receiver
Manufacturer
Analog Devices, Inc.
Datasheet
1.ADM3232E.pdf
(12 pages)
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FEATURES
Data rate: 460 kbps
2 Tx and 2 Rx
Meets EIA-232E specifications
0.1 μF charge pump capacitors
ESD protection to IEC1000-4-2 (801.2)
Contact discharge: ±8 kV
Air gap discharge: ±15 kV
APPLICATIONS
General-purpose RS-232 data link
Portable instruments
Handsets
Industrial/telecom diagnostic ports
GENERAL DESCRIPTION
The ADM3232E transceiver is a high speed, 2-channel RS-232/V.28
interface device that operates from a single 3.3 V power supply.
Low power consumption makes it ideal for battery-powered
portable instruments. The ADM3232E conforms to the EIA-232E
and CCITT V.28 specifications and operates at data rates up to
460 kbps.
All RS-232 (T_
inputs and outputs are protected against electrostatic discharges
(up to ±15 kV ESD protection). This ensures compliance with
IEC 1000-4-2 requirements.
This device is ideally suited for operation in electrically harsh
environments or where RS-232 cables are frequently plugged/
unplugged, with the ±15 kV ESD protection of the ADM3232E
input/output pins.
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 that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
on TTL/CMOS and RS-232 I/Os
OUT
and R_
IN
) and TTL/CMOS (T_
IN
and R_
OUT
±15 kV ESD Protected, 3.3 V, RS-232
)
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Emissions are also controlled to within very strict limits. CMOS
technology is used to keep the power dissipation to an absolute
minimum, allowing maximum battery life in portable applications.
Four external 0.1 μF charge pump capacitors are used for the
voltage doubler/inverter, permitting operation from a single
3.3 V supply.
The ADM3232E is available in a 16-lead narrow SOIC package,
as well as a space-saving 16-lead TSSOP.
TTL/CMOS
OUTPUTS
TTL/CMOS
INPUTS
0.1µF
0.1µF
R1
R2
FUNCTIONAL BLOCK DIAGRAM
10V
10V
T1
T2
OUT
OUT
IN
IN
+
+
Line Driver/Receiver
GND
C1+
C1–
C2+
C2–
©2006 Analog Devices, Inc. All rights reserved.
+3.3V TO +6.6V
+6.6V TO –6.6V
ADM3232E
DOUBLER
INVERTER
VOLTAGE
VOLTAGE
T1
T2
R1
R2
Figure 1.
*INTERNAL 5kΩ PULL-DOWN RESISTOR
ON EACH RS-232 INPUT.
V
5kΩ
5kΩ
CC
V+
V–
+3.3V INPUT
ADM3232E
+
T1
T2
R1
R2
+
C3
0.1µF
6.3V
C4
0.1µF
10V
OUT
OUT
IN
IN
www.analog.com
RS-232
INPUTS*
RS-232
OUTPUTS
+
C5
0.1µF
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