High-Speed RS-485/RS-422 Transceivers

Featured Product from Renesas Electronics Corporation

High-Speed RS-485/RS-422 Transceivers-Image

40Mbps RS-485 Transceivers Offer High ESD Protection Over Extended Temperature Range

Intersil's ISL3159E/79E RS-485/RS-422 transceivers deliver 40Mbps transmission performance over an extended temperature range, enabling precise control of motor positioning in factory automation applications. Available in an ultra-small package, the ISL3179E 3.3V and ISL3159E 5V transceivers offer greater design flexibility for supply voltage, board space savings and rugged environments.


  • High 40Mbps data transfer rate at 125°C while consuming only 4mA of quiescent current
  • Up to ±16.5kV IEC61000 ESD protection on RS-485 I/O pins; Class 3 HBM ESD level on all other pins: >9kV
  • Full fail-safe design ensures a logic high Rx output if Rx inputs are floating, shorted, or terminated but undriven
  • Low bus currents (+220µA/-150µA) present a “1/5 unit load” to the RS-485 bus (allows up to 160 transceivers on the network without using repeaters)
  • Hot plug circuitry ensures Tx and Rx outputs remain three-state during power-up
  • Multiple package options available (SOIC, MSOP and 3mm x 3mm DFN) in both industrial and extended temperature ranges


  • Motor controller/position encoder systems 
  • Factory automation 
  • Field bus networks 
  • Security networks 
  • Building environmental control systems 
  • Industrial/process control networks
  • PROFIBUS DP and FMS networks (ISL3159E only)
  • SCSI “fast 40” drivers and receivers (ISL3159E only)

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