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特長

  • Fault protected RS-485 bus pins:up to ±60V
  • Extended common mode range: ±25V More than twice the range required for RS-485
  • Cable invert pins corrects for reversed cable connections while maintaining Rx full fail-safe functionality
  • Full fail-safe (open, short, terminated) RS-485 receivers
  • 1/4 unit load (UL) for up to 128 devices on the bus
  • High Rx IOL for opto-couplers in isolated designs
  • Hot plug circuitry - Tx and Rx outputs remain three-state during power-up/power-down
  • Slew rate limited RS-485 data rate: 1Mbps
  • Low quiescent supply current: 2.3mA
  • Ultra low shutdown supply current: 10µA

説明

The ISL31483E and ISL31485E are fault protected, 5V powered differential transceivers that exceed the RS-485 and RS-422 standards for balanced communication. The RS-485 transceiver pins (driver outputs and receiver inputs) are fault protected up to ±60V. Additionally, the extended common mode range allows these transceivers to operate in environments with common mode voltages up to ±25V (>2x the RS-485 requirement), making this fault protected RS-485 family one of the most robust on the market. Transmitters deliver an exceptional 2. 5V (typical) differential output voltage into the RS-485 specified 54Ω load. This yields better noise immunity than standard RS-485 ICs, or allows up to six 120Ω terminations in star network topologies. Receiver (Rx) inputs feature a “Full Fail-Safe” design, which ensures a logic high Rx output if Rx inputs are floating, shorted, or on a terminated but undriven (idle) bus. The ISL31483E and ISL31485E include cable invert functions that reverse the polarity of the Rx and/or Tx bus pins in case the cable is misconnected. Unlike competing devices, Rx full fail-safe operation is maintained even when the Rx input polarity is switched.

アプリケーション

  • Utility Meters/Automated Meter Reading Systems
  • 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
Part NumberStatusSamplesStockRoHSPackageLead Count (#)Carrier TypeMoisture Sensitivity Level (MSL)Pb (Lead) FreePb Free CategoryTemp. Range (°C)
ISL31485EIBZObsoleteN/AIn StockRoHS:EN
SOIC8#Tube3YesPb-Free 100% Matte Tin Plate w/Anneal-e3-40 to +85°C
ISL31485EIBZ-TObsoleteN/AIn StockRoHS:EN
SOIC8#Reel3YesPb-Free 100% Matte Tin Plate w/Anneal-e3-40 to +85°C
ISL31485EIBZ-T7AObsoleteN/AOut of StockRoHS:EN
SOIC8#Reel3YesPb-Free 100% Matte Tin Plate w/Anneal-e3-40 to +85°C
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