Product details


Type RS-485 Data rate (Max) (Mbps) 0.5 Isolation rating (Vrms) 5000 Surge voltage capability (Vpk) 6250 Operating temperature range (C) -40 to 125 Rating Catalog open-in-new Find other Signal isolators with integrated power


  • Meets or exceeds the requirements of the TIA/ EIA-485A standard
  • Data rates
    • ISOW1412 : 500 kbps
    • ISOW1432 : 12 Mbps
  • Integrated low-emissions DC-DC converter with low-emissions, low-noise
    • Meets CISPR 32 Class B on a two-layer PCB
    • Low frequency power converter at 25 MHz enabling low noise performance
  • Additional 1 Mbps GPIO channel
  • High efficiency output power
    • Typical efficiency: 47%
    • VISOOUT accuracy: ±5%
    • Additional output current: 20 mA
  • Independent power supply for RS-485 & DC-DC
    • Logic supply (VIO): 1.71 V to 5.5 V
    • Power converter supply ( VDD): 3 V to 5.5 V
  • RS-485 with PROFIBUS compatibility
    • Open, short, and idle bus failsafe
    • 1/8 unit load: up to 256 nodes on bus
    • Glitch-free power up and power down
  • Reinforced isolation barrier
    • Isolation rating: 5000 VRMS
    • Surge capability: 10 kVRMS
    • High CMTI: 100-kV/µs (typical)
  • High ESD bus protection
    • HBM: ±16 kV
    • IEC 61000-4-2 contact discharge: ±8 kV
  • Operating temperature range: -40°C to 125°C
  • Current limit and thermal shutdown
  • 20-pin wide SOIC package
  • Safety-Related Certifications:
    • All certifications planned
    • VDE reinforced insulation per DIN VDE V 0884-11:2017-01
    • UL 1577 component recognition program
    • IEC 62368-1, IEC 61010-1, IEC 60601-1 and GB 4943.1-2011 certifications

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The ISOW14x2 devices are galvanically-isolated RS-485/RS-422 transceivers with a built-in isolated DC-DC converter, that eliminates the need for a separate isolated power supply in space constrained isolated designs. The low-emissions, isolated DC-DC converter meets CISPR 32 radiated emissions Class B standard with just two ferrite beads on a simple two-layer PCB. Additional 20 mA output current can be used to power other circuits on the board. An integrated 1 Mbps GPIO channel helps remove any additional digital isolator or optocoupler for diagnotstics, LED indication or supply monitoring.

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Technical documentation

Design & development

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Hardware development

document-generic User guide

ISOW1412DFMEVM is an evaluation module (EVM) used to evaluate the high performance, reinforced isolated RS-485/RS-422 with integrated isolated DC/DC power ISO1412 in a 20-pin wide body SOIC package (package dode-DFM). The EVM features enough test points and jumper options for one to evaluate the (...)

  • Isolated RS-485/RS-422 transceiver with integrated high-efficiency, low-emissions DC-DC converter
  • Separate IO and DC/DC supply inputs
  • Wide supply and logic level translation range for IO: 1.71 V to 5.5 V
  • Supports 500 kbps datarate
  • Isolation barrier life >40 years
  • This EVM is tested and includes (...)

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