15 kV ESD Protected, 3.3 V, RS-232 Line Driver/Receiver ADM3232E FEATURES FUNCTIONAL BLOCK DIAGRAM +3.3V INPUT Data rate: 460 kbps 2 Tx and 2 Rx ADM3232E +3.3V TO +6.6V C1 C1+ V Meets EIA-232E specifications + CC VOLTAGE 0.1F C3 C5 C1 V+ DOUBLER 10V 0.1F 0.1 F charge pump capacitors 0.1F 6.3V +6.6V TO 6.6V C2 C2+ V + ESD protection to IEC 1000-4-2 (801.2) on RS-232 I/Os C4 VOLTAGE 0.1F C2 0.1F INVERTER 10V Contact discharge: 8 kV 10V Air gap discharge: 15 kV T1 T1 T1 IN OUT TTL/CMOS RS-232 INPUTS OUTPUTS APPLICATIONS T2 T2 T2 IN OUT General-purpose RS-232 data link R1 R1 R1 OUT IN Portable instruments TTL/CMOS 5k RS-232 OUTPUTS INPUTS* Handsets R2 R2 R2 OUT IN Industrial/telecom diagnostic ports 5k GND *INTERNAL 5k PULL-DOWN RESISTOR ON EACH RS-232 INPUT. Figure 1. GENERAL DESCRIPTION Emissions are also controlled to within very strict limits. CMOS The ADM3232E transceiver is a high speed, 2-channel RS-232/V.28 technology is used to keep the power dissipation to an absolute interface device that operates from a single 3.3 V power supply. minimum, allowing maximum battery life in portable applications. Low power consumption makes it ideal for battery-powered portable instruments. The ADM3232E conforms to the EIA-232E Four external 0.1 F charge pump capacitors are used for the and ITU-T V.28 specifications and operates at data rates up to voltage doubler/inverter, permitting operation from a single 460 kbps. 3.3 V supply. All RS-232 (TxOUT and RxIN) inputs and outputs are protected The ADM3232E is available in a 16-lead narrow and wide SOIC against electrostatic discharges (up to 15 kV ESD protection). packages, as well as a space-saving 16-lead TSSOP. 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 RS-232 input/output pins. Rev. B 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 20062011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 06410-001 + + +ADM3232E TABLE OF CONTENTS Features .............................................................................................. 1 Pin Configuration and Function Descriptions..............................5 Applications....................................................................................... 1 Typical Performance Characteristics ..............................................6 Functional Block Diagram .............................................................. 1 Theory of Operation .........................................................................8 General Description ......................................................................... 1 Circuit Description .......................................................................8 Revision History ............................................................................... 2 High Baud Rate..............................................................................8 Specifications..................................................................................... 3 Outline Dimensions..........................................................................9 Absolute Maximum Ratings............................................................ 4 Ordering Guide .......................................................................... 10 ESD Caution.................................................................................. 4 REVISION HISTORY 4/11Rev. A to Rev. B Changes to Features Section and General Description Section ................................................................................................ 1 Change to ESD Protection (RS-232 I/O Pins) Parameter, Table 1 ................................................................................................ 3 Change to ESD Protection on RS-232 Pins Section Heading..... 8 7/08Rev. 0 to Rev. A Added 16-Lead SOIC .........................................................Universal Updated Outline Dimensions ......................................................... 9 Changes to Ordering Guide .......................................................... 10 12/06Revision 0: Initial Version Rev. B Page 2 of 12