200-Kbps, full-duplex, 2.5-kVrms isolated RS-485 & RS-422 transceiver


Product details


Duplex Full Data rate (Max) (Mbps) 0.2 Isolation rating (Vrms) 2500 Integrated transformer driver No Operating temperature range (C) -40 to 85 Fail safe Idle, Open, Short HBM ESD (kV) 12 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
  • Signaling Rates up to 20 Mbps
  • 1/8 Unit Load – Up to 256 Nodes on a Bus
  • 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
  • Bus-Pin ESD Protection
    • 12-kV HBM Between Bus Pins and GND2
    • 6-kV HBM Between Bus Pins and GND1
  • Safety-Related Certifications:
    • 4000-VPK Basic Insulation, 560 VPK VIORM per DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12 and DIN EN 61010-1
    • 2500 VRMS Isolation per UL 1577
    • 4000 VPK Isolation per CSA Component Acceptance Notice 5A and IEC 60950-1

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


The ISO3080 and ISO3086 devices are isolated full-duplex differential line drivers and receivers while the ISO3082 and ISO3088 devices are isolated half-duplex differential line transceivers for TIA/EIA 485/422 applications.

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 isolation barrier of the device is tested to provide 2500 VRMS of isolation for 60 s per UL 1577 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.

The ISO3080, ISO3082, ISO3086, and ISO3088 device are qualified for use from –40°C to +85°C.

open-in-new Find other Isolated RS-485 transceivers
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Same functionality and pinout but is not an equivalent 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
* Datasheet ISO308x Isolated 5-V Full- and Half-Duplex RS-485 Transceivers datasheet (Rev. I) Apr. 20, 2017
More literature CSA Certification (Rev. P) Nov. 19, 2019
More literature VDE certificate for basic isolation for DIN VDE V 0884-11:2017-01 (Rev. Q) Sep. 20, 2019
More literature UL Certification (Rev. N) Jul. 30, 2019
Application notes Isolated RS-485 Transceiver Reference Design May 10, 2019
Application notes How to isolate RS-485 for smallest size and highest reliability (Rev. A) Oct. 18, 2018
Application notes How to isolate signal and power for an RS-485 system (Rev. B) Oct. 16, 2018
Application notes Robust isolated RS-485 enables new industrial applications (Rev. A) Aug. 13, 2018
More literature Blog: Top 7 design questions about isolated RS-485 transceivers Aug. 06, 2018
User guides 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

SBOM423.ZIP (95 KB) - IBIS Model

CAD/CAE symbols

Package Pins Download
SOIC (DW) 16 View options

Ordering & quality

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