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ISO6731

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General-purpose, triple-channel, 2/1, digital isolator

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Data sheet

ISO6731

ACTIVE
Data sheet Order now

Product details

Rating Catalog Integrated isolated power No Isolation rating Reinforced Number of channels 3 Forward/reverse channels 2 forward / 1 reverse Default output High, Low Data rate (max) (Mbps) 50 Surge isolation voltage (VIOSM) (VPK) 10000 Transient isolation voltage (VIOTM) (VPK) 7071 Withstand isolation voltage (VISO) (Vrms) 5000 CMTI (min) (V/µs) 100000 Operating temperature range (°C) -40 to 125 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 1.71 Propagation delay time (typ) (µs) 0.011 Current consumption per channel (DC) (typ) (mA) 1 Current consumption per channel (1 Mbps) (typ) (mA) 1.65 Creepage (min) (mm) 8 Clearance (min) (mm) 8 TI functional safety category Functional Safety-Capable
Rating Catalog Integrated isolated power No Isolation rating Reinforced Number of channels 3 Forward/reverse channels 2 forward / 1 reverse Default output High, Low Data rate (max) (Mbps) 50 Surge isolation voltage (VIOSM) (VPK) 10000 Transient isolation voltage (VIOTM) (VPK) 7071 Withstand isolation voltage (VISO) (Vrms) 5000 CMTI (min) (V/µs) 100000 Operating temperature range (°C) -40 to 125 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 1.71 Propagation delay time (typ) (µs) 0.011 Current consumption per channel (DC) (typ) (mA) 1 Current consumption per channel (1 Mbps) (typ) (mA) 1.65 Creepage (min) (mm) 8 Clearance (min) (mm) 8 TI functional safety category Functional Safety-Capable
SOIC (DW) 16 106.09 mm² 10.3 x 10.3
  • 50 Mbps data rate
  • Robust isolation barrier:
    • High lifetime at 1500 VRMS working voltage
    • Up to 5000 VRMS isolation rating
    • Up to 10 kV surge capability
    • ±150 kV/µs typical CMTI
  • Wide supply range: 1.71 V to 1.89 V and 2.25 V to 5.5 V
  • 1.71 V to 5.5 V level translation
  • Default output high (ISO6731) and low (ISO6731F) options
  • Wide temperature range: –40°C to 125°C
  • 1.6 mA per channel typical at 1 Mbps
  • Low propagation delay: 11 ns typical
  • Robust electromagnetic compatibility (EMC)
    • System-level ESD, EFT, and surge immunity
    • ±8 kV IEC 61000-4-2 contact discharge protection across isolation barrier
    • Low emissions
  • Wide-SOIC (DW-16) Package
  • Safety-Related Certifications:
    • DIN EN IEC 60747-17 (VDE 0884-17)
    • UL 1577 component recognition program
    • IEC 62368-1, IEC 61010-1, IEC 60601-1 and GB 4943.1 certifications
  • 50 Mbps data rate
  • Robust isolation barrier:
    • High lifetime at 1500 VRMS working voltage
    • Up to 5000 VRMS isolation rating
    • Up to 10 kV surge capability
    • ±150 kV/µs typical CMTI
  • Wide supply range: 1.71 V to 1.89 V and 2.25 V to 5.5 V
  • 1.71 V to 5.5 V level translation
  • Default output high (ISO6731) and low (ISO6731F) options
  • Wide temperature range: –40°C to 125°C
  • 1.6 mA per channel typical at 1 Mbps
  • Low propagation delay: 11 ns typical
  • Robust electromagnetic compatibility (EMC)
    • System-level ESD, EFT, and surge immunity
    • ±8 kV IEC 61000-4-2 contact discharge protection across isolation barrier
    • Low emissions
  • Wide-SOIC (DW-16) Package
  • Safety-Related Certifications:
    • DIN EN IEC 60747-17 (VDE 0884-17)
    • UL 1577 component recognition program
    • IEC 62368-1, IEC 61010-1, IEC 60601-1 and GB 4943.1 certifications

The ISO6731 device is a high-performance, triple-channel digital isolators ideal for cost-sensitive applications requiring up to 5000 VRMS isolation ratings per UL 1577. This device is also certified by VDE, TUV, CSA, and CQC.

The ISO6731 devics provides high electromagnetic immunity and low emissions at low power consumption, while isolating CMOS or LVCMOS digital I/Os. Each isolation channel has a logic input and output buffer separated by TI’s double capacitive silicon dioxide (SiO2) insulation barrier. This device comes with enable pins which can be used to put the respective outputs in high impedance for multi-master driving applications. The ISO6731 device has two forward and one reverse-direction channels. In the event of input power or signal loss, the default output is high for the device without suffix F and low for the device with suffix F. See Device Functional Modes section for further details.

Used in conjunction with isolated power supplies, this device helps prevent noise currents on data buses, such as UART, SPI, RS-485, RS-232, and CAN from damaging sensitive circuitry. Through innovative chip design and layout techniques, the electromagnetic compatibility of the ISO6731 device has been significantly enhanced to ease system-level ESD, EFT, surge, and emissions compliance. The ISO6731 device is available in a 16-pin SOIC wide-body (DW) package and is a pin-to-pin upgrade to the older generations.

The ISO6731 device is a high-performance, triple-channel digital isolators ideal for cost-sensitive applications requiring up to 5000 VRMS isolation ratings per UL 1577. This device is also certified by VDE, TUV, CSA, and CQC.

The ISO6731 devics provides high electromagnetic immunity and low emissions at low power consumption, while isolating CMOS or LVCMOS digital I/Os. Each isolation channel has a logic input and output buffer separated by TI’s double capacitive silicon dioxide (SiO2) insulation barrier. This device comes with enable pins which can be used to put the respective outputs in high impedance for multi-master driving applications. The ISO6731 device has two forward and one reverse-direction channels. In the event of input power or signal loss, the default output is high for the device without suffix F and low for the device with suffix F. See Device Functional Modes section for further details.

Used in conjunction with isolated power supplies, this device helps prevent noise currents on data buses, such as UART, SPI, RS-485, RS-232, and CAN from damaging sensitive circuitry. Through innovative chip design and layout techniques, the electromagnetic compatibility of the ISO6731 device has been significantly enhanced to ease system-level ESD, EFT, surge, and emissions compliance. The ISO6731 device is available in a 16-pin SOIC wide-body (DW) package and is a pin-to-pin upgrade to the older generations.
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Technical documentation

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Type Title Date
* Data sheet ISO6731 General-Purpose Triple-Channel Digital Isolator with Robust EMC datasheet (Rev. B) PDF | HTML 26 Jul 2022
Certificate VDE Certificate for Reinforced Isolation for DIN EN IEC 60747-17 (Rev. S) 29 Feb 2024
White paper Improve Your System Performance by Replacing Optocouplers with Digital Isolators (Rev. C) PDF | HTML 07 Sep 2023
Certificate CQC Certificate for ISOxxDWx (Rev. J) 27 Mar 2023
Certificate CSA Certificate for ISO67xxDW 16 Feb 2023
Certificate TUV Certificate for Isolation Devices (Rev. K) 05 Aug 2022
Certificate UL Certificate of Compliance File E181974 Vol 4 Sec 6 (Rev. P) 05 Aug 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 Replace Optocouplers with Digital Isolators in Standard Interface Circuit (Rev. A) PDF | HTML 19 May 2021
Functional safety information ISO6731-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 22 Feb 2021
User guide ISO67xx Triple- and Quad-Digital Isolator Evaluation Module PDF | HTML 30 Jul 2020

Design & development

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

Evaluation board

DIGI-ISO-EVM — Universal digital isolator evaluation module

DIGI-ISO-EVM is an evaluation module (EVM) used to evaluate any of the TI single-channel, dual-channel, triple-channel, quad-channel or six-channel digital isolator devices in five different packages - 8-pin narrow-body SOIC (D), 8-pin wide-body SOIC (DWV), 16-pin wide-body SOIC (DW), 16-pin ultra- (...)

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

ISO6741DWEVM — ISO67xx general-purpose, triple- or quad-channel digital isolator evaluation module

ISO6741DWEVM is an evaluation module used to evaluate the low speed, general purpose, triple- or quad channel-digital isolator ISO67xx in 16-Pin WB SOIC package (package code-DW). The EVM features enough test points and jumper options for one to evaluate the device with minimal external components.
User guide: PDF | HTML
Not available on TI.com
Simulation model

ISO6731 IBIS Model

SLAM353.ZIP (92 KB) - IBIS Model
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Simulation model

ISO6731 PSpice Transient Model

SLLM483.ZIP (887 KB) - PSpice Model
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Reference designs

TIDA-010243 — Three-phase current transformer e-meter reference design with standalone ADC

This reference design implements Class 0.1 three-phase energy measurement using a high-performance, multichannel analog-to-digital converter (ADC), which samples current transformers (CT) at 8 kHz to measure the current and voltage of each leg of the AC mains. This reference design achieves high (...)
Design guide: PDF
Package Pins Download
SOIC (DW) 16 View options
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