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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fisow1412″>View Datasheet

Texas Instruments ISOW14x2 Isolated RS-485/RS-422 Transceivers

Texas Instruments ISOW14x2 Isolated RS-485/RS-422 Transceiver comes with a built-in isolated DC-DC converter, eliminating 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 two ferrite beads on a simple two-layer PCB. The additional 20mA output current can power other circuits on the board. The Texas Instruments ISOW14x2 has an integrated 2Mbps GPIO channel that helps remove any additional digital isolator or optocoupler for diagnostics, LED indication, or supply monitoring.

Features

  • Meets or exceeds the requirements of the TIA/ EIA-485A standard
  • Data rates
    • ISOW1412: 500kbps
    • ISOW1432: 12Mbps
  • Integrated low-emissions DC-DC converter with low-emissions, low-noise
    • Meets CISPR 32 Class B and EN 55032 Class B with margin on a two-layer PCB
    • Low-frequency power converter at 25MHz enabling low noise performance
  • Additional 2Mbps GPIO channel
  • High-efficiency output power
    • 46% typical efficiency
    • ±5% VISOOUT accuracy
    • 20mA additional output current
  • Independent power supply for RS-485 and DC-DC
    • 1.71V to 5.5V logic supply (VIO)
    • 3V to 5.5V power converter supply (VDD)
  • RS-485 with PROFIBUS compatibility
    • Open, short, and idle bus failsafe
    • 1/8 unit load: up to 256 nodes on the bus
    • Glitch-free power up and power down
  • Reinforced and Basic isolation options
  • High CMTI: 100kV/µs (typical)
  • High ESD bus protection
    • ±16kV HBM
    • ±8kV IEC 61000-4-2 contact discharge
  • -40°C to 125°C operating temperature range
  • Current limit and thermal shutdown
  • 20-pin wide SOIC package
  • Section 8.6
    • VDE reinforced and basic 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

Applications

  • Factory automation
  • Building automation
  • Industrial transport
  • Solar inverters, protection relay
  • Motor drives

Simplified Schematic

Schematic - Texas Instruments ISOW14x2 Isolated RS-485/RS-422 Transceivers

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Texas Instruments ISOW14x2 Isolated RS-485/RS-422 Transceivers