Product details

Rating Catalog Integrated isolated power No Isolation rating Basic Number of channels 2 Forward/reverse channels 1 forward / 1 reverse Default output High, Low Data rate (max) (Mbps) 50 Surge isolation voltage (VIOSM) (VPK) 6500 Transient isolation voltage (VIOTM) (VPK) 4242 Withstand isolation voltage (VISO) (Vrms) 3000 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) 1.2 Current consumption per channel (1 Mbps) (typ) (mA) 1.8 Creepage (min) (mm) 4 Clearance (min) (mm) 4 TI functional safety category Functional Safety-Capable
Rating Catalog Integrated isolated power No Isolation rating Basic Number of channels 2 Forward/reverse channels 1 forward / 1 reverse Default output High, Low Data rate (max) (Mbps) 50 Surge isolation voltage (VIOSM) (VPK) 6500 Transient isolation voltage (VIOTM) (VPK) 4242 Withstand isolation voltage (VISO) (Vrms) 3000 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) 1.2 Current consumption per channel (1 Mbps) (typ) (mA) 1.8 Creepage (min) (mm) 4 Clearance (min) (mm) 4 TI functional safety category Functional Safety-Capable
SOIC (D) 8 29.4 mm² 4.9 x 6
  • Functional Safety-Capable
    • Documentation available to aid functional safety system design: ISO6720, ISO6721
  • 50-Mbps data rate
  • Robust isolation barrier:
    • High lifetime at 450 VRMS working voltage
    • Up to 3000 VRMS isolation rating
    • ±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 (ISO672xB) and Low (ISO672xFB) Options
  • Wide temperature range: –40°C to +125°C
  • 1.8 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
  • Narrow-SOIC (D-8) 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
    • GB 4943.1
  • Functional Safety-Capable
    • Documentation available to aid functional safety system design: ISO6720, ISO6721
  • 50-Mbps data rate
  • Robust isolation barrier:
    • High lifetime at 450 VRMS working voltage
    • Up to 3000 VRMS isolation rating
    • ±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 (ISO672xB) and Low (ISO672xFB) Options
  • Wide temperature range: –40°C to +125°C
  • 1.8 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
  • Narrow-SOIC (D-8) 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
    • GB 4943.1

The ISO672xB devices are high-performance, dual-channel digital isolators ideal for cost sensitive applications requiring up to 3000 VRMS (D package) isolation ratings per UL 1577. These devices are also certified by VDE, TUV, CSA, and CQC.

The ISO672xB devices provide 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. The ISO6720B device has 2 isolation channels with both channels in the same direction. The ISO6721B device has 2 isolation channels with 1 channel in each direction. In the event of input power or signal loss, the default output is high for devices without suffix F and low for devices with suffix F. See Device Functional Modes section for further details.

Used in conjunction with isolated power supplies, these devices help 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 ISO672xB devices has been significantly enhanced to ease system-level ESD, EFT, surge, and emissions compliance. The ISO672xB family of devices is available in a 8-pin SOIC narrow-body (D) package and is a pin-to-pin upgrade to the older generations. For reinforced isolation requirements, refer to the ISO672x-Q1.

The ISO672xB devices are high-performance, dual-channel digital isolators ideal for cost sensitive applications requiring up to 3000 VRMS (D package) isolation ratings per UL 1577. These devices are also certified by VDE, TUV, CSA, and CQC.

The ISO672xB devices provide 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. The ISO6720B device has 2 isolation channels with both channels in the same direction. The ISO6721B device has 2 isolation channels with 1 channel in each direction. In the event of input power or signal loss, the default output is high for devices without suffix F and low for devices with suffix F. See Device Functional Modes section for further details.

Used in conjunction with isolated power supplies, these devices help 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 ISO672xB devices has been significantly enhanced to ease system-level ESD, EFT, surge, and emissions compliance. The ISO672xB family of devices is available in a 8-pin SOIC narrow-body (D) package and is a pin-to-pin upgrade to the older generations. For reinforced isolation requirements, refer to the ISO672x-Q1.

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Technical documentation

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Type Title Date
* Data sheet ISO672x General Purpose Basic Dual-Channel Digital Isolators with Robust EMC datasheet (Rev. F) PDF | HTML 04 Jan 2023
Certificate VDE Certificate for Reinforced Isolation for DIN EN IEC 60747-17 (Rev. S) 29 Feb 2024
Certificate VDE Certificate for Basic Isolation for DIN EN IEC 60747-17 (Rev. W) 31 Jan 2024
White paper Improve Your System Performance by Replacing Optocouplers with Digital Isolators (Rev. C) PDF | HTML 07 Sep 2023
Certificate CSA Certificate for ISO672xDWV 15 Mar 2023
Certificate CSA Certificate for ISO672xD 14 Mar 2023
Certificate CQC Certificate for ISOxxD (Rev. A) 07 Feb 2023
Certificate CQC Certificate for ISOxxDWV (Rev. A) 07 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 ISO6721/ISO6721-Q1 Functional Safety FIT Rate, FMD and Pin FMA 19 Mar 2021
EVM User's guide Universal Digital Isolator Evaluation Module PDF | HTML 04 Mar 2021
Certificate ISO6721DEVM EU Declaration of Conformity (DoC) 31 Jul 2020
EVM User's guide ISO672x Dual-Channel Digital Isolator Evaluation Module PDF | HTML 12 Jul 2020
Technical article Top 9 design questions about digital isolators PDF | HTML 04 Feb 2019

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

ISO6721DEVM — ISO672x general-purpose, dual-channel, digital isolator evaluation module

ISO6721DEVM is an evaluation module used to evaluate the low speed, general purpose, robust EMC dual channel digital isolator ISO6721 in 8-Pin SOIC package (package code D). 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

ISO6721 PSpice Transient Model

SLLM468.ZIP (413 KB) - PSpice Model
Simulation model

ISO6721 IBIS Model (Rev. A)

SLLM456A.ZIP (80 KB) - IBIS Model
Reference designs

TIDA-010273 — 250W motor inverter reference design

This reference design is a 250W motor drive for a major appliances or similar applications, which illustrates a GaN IPM DRV7308 based high efficiency motor inverter without heatsink, also demo a low standby power design with UCC28911. This reference design shows a method to implement sensorless FOC (...)
Design guide: PDF
Reference designs

TIDA-010250 — 1-kW brushless DC motor inverter reference design

This reference design illustrates a motor inverter with MSPM0G, an Arm® Cortex®-M0+ core microcontroller. The design not only supports a sensorless Field Oriented Control (FOC) algorithm with 1-3 shunt resistors, but also a sensored motor driving algorithm with a Hall or Quadrature Encoder (...)
Design guide: PDF
Reference designs

TIDA-010265 — 750W motor inverter with C2000™ MCU and MSPM0 reference design

This reference design is a 750W motor drive for a washing machine or similar equipment, which illustrates a method to implement sensorless field oriented control (FOC) for a three-phase permanent magnet synchronous motor (PMSM) with a flux, angle, speed and torque observer (FAST) software encoder (...)
Design guide: PDF
Package Pins CAD symbols, footprints & 3D models
SOIC (D) 8 Ultra Librarian

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