NOT RECOMMENDED FOR NEW DESIGNS RECOMMENDED REPLACEMENT PART ISL32483E, ISL32485E DATASHEET ISL31483E, ISL31485E FN7638 Rev 4.00 Fault Protected, Extended CMR, RS-485/RS-422 Transceivers with Cable Invert May 13, 2015 The ISL31483E and ISL31485E are fault protected, 5V powered Features differential transceivers that exceed the RS-485 and RS-422 Fault protected RS-485 bus pins up to 60V standards for balanced communication. The RS-485 transceiver pins (driver outputs and receiver inputs) are fault protected up to Extended common mode range 25V 60V. Additionally, the extended common mode range allows More than twice the range required for RS-485 these transceivers to operate in environments with common Cable invert pins mode voltages up to 25V (>2x the RS-485 requirement), corrects for reversed cable connections while maintaining making this fault protected RS-485 family one of the most Rx full fail-safe functionality robust on the market. Full fail-safe (open, short, terminated) RS-485 receivers Transmitters deliver an exceptional 2.5V (typical) differential 1/4 unit load (UL) for up to 128 devices on the bus output voltage into the RS-485 specified 54 load. This yields better noise immunity than standard RS-485 ICs, or allows up High Rx I for opto-couplers in isolated designs OL to six 120 terminations in star network topologies. Hot plug circuitry - Tx and Rx outputs remain three-state during power-up/power-down Receiver (Rx) inputs feature a Full Fail-Safe design, which ensures a logic high Rx output if Rx inputs are floating, shorted, Slew rate limited RS-485 data rate . 1Mbps or on a terminated but undriven (idle) bus. Low quiescent supply current 2.3mA The ISL31483E and ISL31485E include cable invert functions Ultra low shutdown supply current 10A that reverse the polarity of the Rx and/or Tx bus pins in case the cable is misconnected. Unlike competing devices, Rx full Applications fail-safe operation is maintained even when the Rx input polarity Utility meters/automated meter reading systems is switched. High node count RS-485 systems PROFIBUS and RS-485 based field bus networks and factory automation Security camera networks Building lighting and environmental control systems Industrial/process control networks 30 25 VID = 1V B 25 A 12 20 15 0 10 -7 -12 5 RO -20 0 -25 -5 STANDARD RS-485 CLOSEST ISL3148XE TIME (400ns/DIV) TRANSCEIVER COMPETITOR FIGURE 1. EXCEPTIONAL Rx OPERATES AT 1Mbps EVEN WITH FIGURE 2. TRANSCEIVERS DELIVER SUPERIOR COMMON MODE 25V COMMON MODE VOLTAGE RANGE vs STANDARD RS-485 DEVICES FN7638 Rev 4.00 Page 1 of 18 May 13, 2015 VOLTAGE (V) COMMON MODE RANGEISL31483E, ISL31485E Table of Contents Ordering Information 3 Pin Configurations . 4 Pin Descriptions . 4 Truth Tables . 5 Typical Operating Circuits 5 Absolute Maximum Ratings . 6 Thermal Information . 6 Recommended Operating Conditions 6 Electrical Specifications . 6 Test Circuits and Waveforms 9 Application Information . 11 Receiver (Rx) Features . 11 Driver (Tx) Features 11 High Overvoltage (Fault) Protection Increases Ruggedness 11 Widest Common Mode Voltage (CMV) Tolerance Improves Operating Range . 11 Cable Invert (Polarity Reversal) Function 11 High VOD Improves Noise Immunity and Flexibility . 12 Hot Plug Function . 12 Data Rate, Cables and Terminations . 12 Built-in Driver Overload Protection . 12 Low Power Shutdown Mode . 13 Typical Performance Curves . 14 Die Characteristics . 15 Revision History 16 About Intersil 16 Package Outline Drawing 17 M14.15 17 M8.15 . 18 FN7638 Rev 4.00 Page 2 of 18 May 13, 2015