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ADM3232E Datasheet(PDF) 1 Page - Analog Devices

Part No. ADM3232E
Description  -15 kV ESD Protected, 3.3 V, RS-232 Line Driver/Receiver
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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±15 kV ESD Protected, 3.3 V, RS-232
Line Driver/Receiver
ADM3232E
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.
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)
on TTL/CMOS and RS-232 I/Os
Contact discharge: ±8 kV
Air gap discharge: ±15 kV
APPLICATIONS
General-purpose RS-232 data link
Portable instruments
Handsets
Industrial/telecom diagnostic ports
FUNCTIONAL BLOCK DIAGRAM
C1+
C2+
C1–
C2–
VCC
V–
V+
T1IN
T1OUT
T2IN
T2OUT
R1OUT
R1IN
R2OUT
R2IN
TTL/CMOS
INPUTS
RS-232
OUTPUTS
TTL/CMOS
OUTPUTS
RS-232
INPUTS*
T1
T2
R1
R2
+
+
0.1µF
10V
0.1µF
10V
GND
ADM3232E
C3
0.1µF
6.3V
+3.3V INPUT
+3.3V TO +6.6V
VOLTAGE
DOUBLER
+6.6V TO –6.6V
VOLTAGE
INVERTER
C5
0.1µF
C4
0.1µF
10V
*INTERNAL 5kΩ PULL-DOWN RESISTOR
ON EACH RS-232 INPUT.
5kΩ
5kΩ
Figure 1.
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_OUT and R_IN) and TTL/CMOS (T_IN and R_OUT)
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.
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.




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