1-Mbps, full-duplex, 2.5-kVrms isolated RS-485 & RS-422 transceiver


Product details


Duplex Full Data rate (Max) (Mbps) 1 Isolation rating (Vrms) 2500 Integrated isolated power No Operating temperature range (C) -40 to 85, -55 to 125 Fail safe Idle, Open, Short HBM ESD (kV) 16 Surge voltage capability (Vpk) 4000 open-in-new Find other Isolated RS-485 transceivers

Package | Pins | Size

SOIC (DW) 16 77 mm² 10.3 x 7.5 open-in-new Find other Isolated RS-485 transceivers


  • Meets or Exceeds TIA/EIA RS-485 Requirements
  • 1/8 Unit Load – Up to 256 Nodes on a Bus
  • Signaling Rates up to 1 Mbps
  • Thermal Shutdown Protection
  • Low Bus Capacitance – 16 pF (Typical)
  • 50 kV/µs Typical Transient Immunity
  • Fail-safe Receiver for Bus Open, Short, Idle
  • 3.3-V Inputs are 5-V Tolerant
  • Safety and Regulatory Approvals
    • 4000-VPK VIOTM, 560-VPK VIORM per DIN V VDE
      V 0884-10 (VDE V 0884-10):2006-12 and DIN EN 61010-1
    • 2500 VRMS Isolation Rating per UL 1577
    • 2500 VRMS Isolation Rating per CSA CA5A and IEC 60950-1
    • Security Systems
    • Chemical Production
    • Factory Automation
    • Motor and Motion Control
    • HVAC and Building Automation Networks
    • Networked Security Stations

All other trademarks are the property of their respective owners

open-in-new Find other Isolated RS-485 transceivers


The ISO15 is an isolated half-duplex differential line transceiver while the ISO35 is an isolated full-duplex differential line driver and receiver for TIA/EIA 485/422 applications. The ISO15M and ISO35M have extended ambient temperature ratings of –55°C to 125°C while the ISO15 and ISO35 are specified over –40°C to 85°C.

These devices are ideal for long transmission lines because the ground loop is broken to allow for a much larger common-mode voltage range. The symmetrical barrier of the device is tested to provide isolatlion of 4000 VPK per VDE and 2500 VRMS per UL and CSA between the bus-line transceiver and the logic-level interface.

Any cabled I/O can be subjected to electrical noise transients from various sources. These noise transients can cause damage to the transceiver and/or nearby sensitive circuitry if they are of sufficient magnitude and duration. These isolated devices can significantly increase protection and reduce the risk of damage to expensive control circuits.

open-in-new Find other Isolated RS-485 transceivers
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Pin-for-pin with same functionality to the compared device.
ISO1412 ACTIVE EMC protected, 500-Kbps, full-duplex, 5-kVrms isolated RS-485 & RS-422 transceiver This updated device has a higher isolation rating, increased transceiver EMC protection, wider supply range and stronger CMTI

Technical documentation

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Type Title Date
* Data sheet ISOx5 Isolated 3.3-V Half- and Full-Duplex RS-485 Transceivers datasheet (Rev. G) Mar. 09, 2015
Certificate VDE Certificate for Basic Isolation for DIN VDE V 0884-11:2017-01 (Rev. S) Aug. 03, 2021
Certificate CSA Certification (Rev. Q) Jun. 14, 2021
White paper Distance Through Insulation: How Digital Isolators Meet Certification Requiremen Jun. 11, 2021
Application note How to Isolate RS-485 for Smallest Size and Highest Reliability (Rev. B) May 27, 2021
Application note How to Isolate Signal and Power for an RS-485 System (Rev. C) May 25, 2021
Application note Robust Isolated RS-485 Enables New Industrial Applications (Rev. B) May 25, 2021
Certificate UL Certification (Rev. O) Feb. 03, 2021
Application note Isolated RS-485 Transceiver Reference Design May 10, 2019
More literature Blog: Top 7 design questions about isolated RS-485 transceivers Aug. 06, 2018
User guide ISO485EVM Isolated RS-485 EVM (Rev. A) Feb. 07, 2018

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide
The ISO485 evaluation module (EVM) supports the parametric evaluation of RS-485 digital isolators. The EVM will be delivered with an ISO3082DW factory installed on the board. This EVM is intended to be used with the ISO15, ISO35 (SLOS580) and ISO3080, ISO3082, ISO3086 or ISO3088 (SLOS581). If (...)
  • 4000-VPEAK Isolation, 560-Vpeak VIORM
  • UL 1577, IEC 60747-5-2 (VDE 0884, Rev 2
  • Bus-Pin ESD Protection

         – 16 kV HBM Between Bus Pins and GND2

         – 6 kV HBM Between Bus Pins and GND1

  • 1/8 Unit Load – Up to 256 Nodes on a Bus
  • Meets or Exceeds TIA/EIA RS-485 requirements
  • Signaling Rates up to 20 Mbps
  • Thermal Shutdown (...)

Design tools & simulation

SLLC331.ZIP (12 KB) - IBIS Model

Reference designs

Isolated RS-485 to Wi-Fi Bridge with 24 VAC Power Reference Design
TIDA-00486 TIDA-00486 uses our SimpleLink Wi-Fi® CC3200 Internet-on-a-chip wireless MCU module to create a data bridge between an RS-485 network and a Wi-Fi network. The ISO15 transceiver provides an isolated RS-485 interface with up to 2500 VRMS of isolation. The LM5160 Fly-Buck™ power supply (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
SOIC (DW) 16 View options

Ordering & quality

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Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

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