15 kV ESD Protected, Slew Rate Limited, 5 V, RS-485 Transceiver ADM483E FEATURES FUNCTIONAL BLOCK DIAGRAM 15 kV ESD protection ADM483E 250 kbps data rate RO R Reduced slew rate for low EM interference RE B Single 5 V 10% supply DE 7 V to +12 V bus common-mode range A Up to 32 nodes on the bus DI D Receiver open-circuit, fail-safe design Short-circuit protection Figure 1. 36 A supply current 0.1 A shutdown current APPLICATIONS Low power RS-485 systems Electrically harsh environments EMI sensitive applications DTE-DCE interface Packet switching Local area networks GENERAL DESCRIPTION Drivers are short-circuit current-limited and are protected The ADM483E is a 5 V, low power data transceiver with 15 kV against excessive power dissipation by thermal shutdown ESD protection suitable for half-duplex communication on circuitry that places their outputs into a high impedance state. multipoint bus transmission lines. The ADM483E is designed The receiver input has a fail-safe feature that guarantees a logic for balanced data transmission and complies with TIA/EIA high output if the input is open circuit. Standards RS-485 and RS-422, which allow up to 32 transceivers on a bus. The ADM483E is fully specified over the industrial temperature ranges and is available in 8-lead SOIC N packages. The ADM483E has a low current shutdown mode in which it consumes only 0.1 A. Because only one driver is enabled at any time, the output of a disabled or power-down driver is three-stated to avoid overloading the bus. Rev. A 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 19972007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 06012-001ADM483E TABLE OF CONTENTS Features .............................................................................................. 1 Test Circuits and Switching Characteristics...................................9 Applications....................................................................................... 1 General Information ...................................................................... 11 Functional Block Diagram .............................................................. 1 ESD Transient Protection Scheme ........................................... 11 General Description ......................................................................... 1 ESD Testing ................................................................................. 12 Revision History ............................................................................... 2 Applications Information .............................................................. 13 Specifications..................................................................................... 3 Differential Data Transmission ................................................ 13 Timing Specifications .................................................................. 4 Cable and Data Rate................................................................... 13 Absolute Maximum Ratings............................................................ 5 Outline Dimensions....................................................................... 14 ESD Caution.................................................................................. 5 Ordering Guide .......................................................................... 14 Pin Configuration and Function Descriptions............................. 6 Typical Performance Characteristics ............................................. 7 REVISION HISTORY 12/07Rev. 0 to Rev. A Updated Format..................................................................Universal Changes to Features ......................................................................... 1 Changes to General Description .................................................... 1 Changes to Table 1............................................................................ 3 Changes to Table 2............................................................................ 4 Changes to Table 3............................................................................ 5 Changes to Table 5............................................................................ 6 Changes to Typical Performance Characteristics Section........... 7 Changes to Test Circuits and Switching Characteristics Section...9 Changes to General Information Section.................................... 11 Updated Outline Dimensions ....................................................... 14 Changes to Ordering Guide .......................................................... 14 1/97Revision 0: Initial Version Rev. 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