Product details

Rating Catalog Isolation rating Basic Data rate (max) (Mbps) 20 Working isolation voltage (VIOWM) (Vrms) 400 Surge isolation voltage (VIOSM) (VPK) 4000 Transient isolation voltage (VIOTM) (VPK) 4242 Withstand isolation voltage (VISO) (Vrms) 2500 CMTI (min) (kV/µs) 25 Operating temperature range (°C) -40 to 85 Type RS-485
Rating Catalog Isolation rating Basic Data rate (max) (Mbps) 20 Working isolation voltage (VIOWM) (Vrms) 400 Surge isolation voltage (VIOSM) (VPK) 4000 Transient isolation voltage (VIOTM) (VPK) 4242 Withstand isolation voltage (VISO) (Vrms) 2500 CMTI (min) (kV/µs) 25 Operating temperature range (°C) -40 to 85 Type RS-485
SOIC (DW) 16 106.09 mm² 10.3 x 10.3
  • Meets or exceeds TIA/EIA-485-A
  • Signaling rate up to 20 Mbps
  • 1/8 unit load – up to 256 nodes on a bus
  • Thermal shutdown protection
  • Typical efficiency > 60% (I LOAD = 100 mA) - see SLUU469
  • Low bus capacitance 7 pF (typical)
  • 50-kV/µs typical transient immunity
  • Fail-safe receiver for bus open, short, idle
  • Logic inputs are 5 V tolerant
  • Bus-pin ESD protection
    • 11-kV HBM between bus-pins and GND2
    • 6-kV HBM between bus-pins and GND1
  • Safety and regulatory approvals
    • 4242 V PK basic insulation per DIN EN IEC 60747-17 (VDE 0884-17)
    • 2500 V RMS isolation for 1 minute per UL 1577
    • CSA component acceptance notice 5A, IEC 60950-1 and IEC 61010-1 standards

  • Meets or exceeds TIA/EIA-485-A
  • Signaling rate up to 20 Mbps
  • 1/8 unit load – up to 256 nodes on a bus
  • Thermal shutdown protection
  • Typical efficiency > 60% (I LOAD = 100 mA) - see SLUU469
  • Low bus capacitance 7 pF (typical)
  • 50-kV/µs typical transient immunity
  • Fail-safe receiver for bus open, short, idle
  • Logic inputs are 5 V tolerant
  • Bus-pin ESD protection
    • 11-kV HBM between bus-pins and GND2
    • 6-kV HBM between bus-pins and GND1
  • Safety and regulatory approvals
    • 4242 V PK basic insulation per DIN EN IEC 60747-17 (VDE 0884-17)
    • 2500 V RMS isolation for 1 minute per UL 1577
    • CSA component acceptance notice 5A, IEC 60950-1 and IEC 61010-1 standards

The ISO3086T is an isolated differential line transceiver with integrated oscillator outputs that provide the primary voltage for an isolation transformer. The device is a full-duplex differential line transceiver for RS-485 and RS-422 applications that can easily be configured for half-duplex operation by connecting pin 11 to pin 14, and pin 12 to pin 13.

These devices are ideal for long transmission lines since 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 4242 V PK of isolation for 1 minute per VDE 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 near-by 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 ISO3086T is specified for use from –40°C to 85°C.

The ISO3086T is an isolated differential line transceiver with integrated oscillator outputs that provide the primary voltage for an isolation transformer. The device is a full-duplex differential line transceiver for RS-485 and RS-422 applications that can easily be configured for half-duplex operation by connecting pin 11 to pin 14, and pin 12 to pin 13.

These devices are ideal for long transmission lines since 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 4242 V PK of isolation for 1 minute per VDE 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 near-by 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 ISO3086T is specified for use from –40°C to 85°C.

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Technical documentation

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Type Title Date
* Data sheet ISO3086T Isolated 5-V RS-485 Transceiver With Integrated Transformer Driver datasheet (Rev. E) PDF | HTML 17 Aug 2023
Certificate VDE Certificate for Basic Isolation for DIN EN IEC 60747-17 (Rev. W) 31 Jan 2024
Certificate CSA Certificate for ISOxxTDW 21 Feb 2023
Product overview Isolation for RS-485 PDF | HTML 21 Aug 2022
Certificate UL Certificate of Compliance File E181974 Vol 4 Sec 2 10 Aug 2022
Application brief Robust Isolated RS-485 Enables New Industrial Applications (Rev. C) PDF | HTML 26 Jul 2022
Application brief How to Isolate RS-485 for Smallest Size and Highest Reliability (Rev. C) PDF | HTML 06 Jul 2022
White paper Why are Digital Isolators Certified to Meet Electrical Equipment Standards? 16 Nov 2021
White paper Distance Through Insulation: How Digital Isolators Meet Certification Requiremen PDF | HTML 11 Jun 2021
Application brief How to Isolate Signal and Power for an RS-485 System (Rev. C) PDF | HTML 25 May 2021
Analog Design Journal 3Q 2011 Issue Analog Applications Journal 16 Sep 2011
Analog Design Journal Isolated RS-485 transceivers support DMX512 stage lighting & special-effects app 16 Sep 2011
Analog Design Journal Журнал по применению аналоговых компонентов 3Q 2011 01 Sep 2011
User guide ISO3086T EVM-436 Description 09 Nov 2010
EVM User's guide ISO1176T/35T/3086T Evaluation Module User's Guide (Rev. A) 13 Jul 2010

Design & development

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

Evaluation board

ISO1176TEVM — ISO1176T Evaluation Module

This document describes the ISO1176T/35T/3086T Evaluation Module (EVM). It is used to evaluate the ISO1176T PROFIBUS Transceiver, the ISO35T RS-485 transceiver, or ISO3086T RS-485 Transceiver. Because the devices are similar transceivers, and the printed-circuit board is the same for all three (...)

User guide: PDF
Not available on TI.com
Evaluation board

ISO3086TEVM — ISO3086T EVM

This document describes the ISO1176T/35T/3086T Evaluation Module (EVM). It is used to evaluate the ISO1176T PROFIBUS Transceiver, the ISO35T RS-485 Transceiver or the ISO3086T RS-485 Transceiver. Because the devices are similar the same printed-circuit board is used for all three EVMs. One manual (...)

User guide: PDF
Not available on TI.com
Evaluation board

ISO3086TEVM-436 — ISO3086T Small EVM

The smaller EVM version shows the customer the space required for their design. This circuit provides an isolated, 20 Mbps, 3.3V to 5V RS-485 interface using the ISO3086T isolated RS-485 transceiver and the TPS76350 high accuracy linear regulator. This circuit achieves signal and power isolation (...)

User guide: PDF
Not available on TI.com
Evaluation board

ISO35TEVM — ISO35T Evaluation Module

This document describes the ISO1176T/35T/3086T Evaluation Module (EVM). It is used to evaluate the ISO1176T PROFIBUS Transceiver, the ISO35T RS-485 transceiver, or ISO3086T RS-485 Transceiver. Because the devices are similar transceivers, and the printed-circuit board is the same for all three (...)

User guide: PDF
Not available on TI.com
Simulation model

ISO3086T IBIS Model

SLLM135.ZIP (327 KB) - IBIS Model
Reference designs

TIDA-00058 — 20Mbps Isolated RS-485 Reference Design

This reference design provides an isolated, 20-Mbps, 3.3-V to 5-V RS-485 interface using the ISO3086T isolated RS-485 transceiver and the TPS76350 high-accuracy linear regulator. This circuit achieves signal and power isolation and at the same time decreases board space and power consumption.
Test report: PDF
Schematic: PDF
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SOIC (DW) 16 View options

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