DATASHEET ISL32483E, ISL32485E FN7785 Rev.4.00 Fault Protected, Extended CMR, RS-485/RS-422 Transceivers with Cable Invert Feb 15, 2019 and 16.5kV ESD The ISL32483E and ISL32485E (ISL3248xE) are fault protected, Features 5V powered differential transceivers that exceed the RS-485 and Fault protected RS-485 bus pins up to 60V RS-422 standards for balanced communication. The RS-485 transceiver pins (driver outputs and receiver inputs) are fault Extended common-mode range 25V protected up to 60V and are protected against 16.5kV ESD more than twice the range required for RS-485 strikes without latch-up. Additionally, the extended common- 16.5kV HBM ESD protection on RS-485 bus pins mode range allows these transceivers to operate in environments Cable invert pins corrects for reversed cable connections with common-mode voltages up to 25V (>2X the RS-485 while maintaining Rx full fail-safe functionality requirement), making this fault-protected RS-485 family one of the most robust on the market. Full fail-safe (open, short, terminated) RS-485 receivers 1/4 Unit Load (UL) for up to 128 devices on the bus The transmitters (Tx) deliver an exceptional 2.5V (typical) differential output voltage into the RS-485 specified 54 load. High Rx I for opto-couplers in isolated designs OL This yields better noise immunity than standard RS-485 ICs or Hot plug circuitry: Tx and Rx outputs remain three-state allows up to six 120 terminations in star network topologies. during power-up/power-down The receiver (Rx) inputs feature a full fail-safe design that Slew rate limited RS-485 data rate . 1Mbps ensures a logic high Rx output if the Rx inputs are floating, Low quiescent supply current 2.3mA shorted, or on a terminated but undriven (idle) bus. Ultra low shutdown supply current 10A The ISL32483E and ISL32485E include cable invert functions that reverse the polarity of the Rx and/or Tx bus pins if the Applications cable is misconnected. Unlike competing devices, the Rx full fail-safe operation is maintained even when the Rx input Utility meters/automated meter reading systems polarity is switched. High node count RS-485 systems For fault protected RS-485 transceivers without the cable PROFIBUS and RS-485 based field bus networks and invert function, see the ISL32470E and ISL32490E factory automation datasheets. Security camera networks Building lighting and environmental control systems Related Literature Industrial/process control networks For a full list of related documents, visit our website: ISL32483E, ISL32485E device pages 30 25 VID = 1V B 25 A 12 20 15 0 10 -7 -12 5 RO -20 0 -25 -5 STANDARD RS-485 CLOSEST ISL3248xE 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 FN7785 Rev.4.00 Page 1 of 18 Feb 15, 2019 VOLTAGE (V) COMMON-MODE RANGEISL32483E, ISL32485E Typical Operating Circuits +5V +5V + + 0.1F 0.1F 13, 14 13, 14 1 V V RINV CC CC R B 11 Y T 9 DI 2 RO 5 R A 12 Z D 10 3 RE DE 4 4 DE 3 RE 9 R Y T B 11 5 DI RO 2 10 R D Z A 12 1 RINV 8 8 DINV DINV GND GND 6, 7 6, 7 THE IC ON THE LEFT HAS THE CABLE CONNECTIONS SWAPPED, SO THE INV PINS (1, 8) ARE STRAPPED HIGH TO INVERT ITS Rx AND Tx POLARITY FIGURE 3. ISL32483E FULL DUPLEX EXAMPLE Ordering Information PART NUMBER PART TEMP. RANGE TAPE AND REEL PACKAGE PKG. (Notes 2, 3) MARKING (C) (Units) (Note 1) (RoHS Compliant) DWG. ISL32483EIBZ ISL32483 EIBZ -40 to +85 - 14 Ld SOIC M14.15 ISL32483EIBZ-T ISL32483 EIBZ -40 to +85 2.5k 14 Ld SOIC M14.15 ISL32483EIBZ-T7A ISL32483 EIBZ -40 to +85 250 14 Ld SOIC M14.15 ISL32485EIBZ 32485 EIBZ -40 to +85 - 8 Ld SOIC M8.15 ISL32485EIBZ-T 32485 EIBZ -40 to +85 2.5k 8 Ld SOIC M8.15 ISL32485EIBZ-T7A 32485 EIBZ -40 to +85 250 8 Ld SOIC M8.15 NOTES: 1. See TB347 for details about reel specifications. 2. These Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 3. For Moisture Sensitivity Level (MSL), see the ISL32483E and ISL32485E device pages. For more information about MSL, see TB363. TABLE 1. SUMMARY OF FEATURES POLARITY HALF/FULL DATA RATE SLEW-RATE EN HOT REVERSAL QUIESCENT I LOW POWER CC PART NUMBER DUPLEX (Mbps) LIMITED PINS PLUG PINS (mA) SHUTDOWN PIN COUNT ISL32483E Full 1 Yes Yes Yes Yes 2.3 Yes 14 ISL32485E Half 1 Yes Tx Only Yes Yes 2.3 No 8 FN7785 Rev.4.00 Page 2 of 18 Feb 15, 2019