Product details

Rating Catalog Integrated isolated power No Isolation rating Basic, Reinforced Number of channels 3 Forward/reverse channels 2 forward / 1 reverse Default output High, Low Data rate (max) (Mbps) 100 Surge isolation voltage (VIOSM) (VPK) 6400, 7800, 12800 Transient isolation voltage (VIOTM) (VPK) 4242, 8000 Withstand isolation voltage (VISO) (Vrms) 3000, 5000 CMTI (min) (V/µs) 85000 Operating temperature range (°C) -55 to 125 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 2.25 Propagation delay time (typ) (µs) 0.0107 Current consumption per channel (DC) (typ) (mA) 0.97 Current consumption per channel (1 Mbps) (typ) (mA) 1.53 Creepage (min) (mm) 3.7, 8 Clearance (min) (mm) 3.7, 8
Rating Catalog Integrated isolated power No Isolation rating Basic, Reinforced Number of channels 3 Forward/reverse channels 2 forward / 1 reverse Default output High, Low Data rate (max) (Mbps) 100 Surge isolation voltage (VIOSM) (VPK) 6400, 7800, 12800 Transient isolation voltage (VIOTM) (VPK) 4242, 8000 Withstand isolation voltage (VISO) (Vrms) 3000, 5000 CMTI (min) (V/µs) 85000 Operating temperature range (°C) -55 to 125 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 2.25 Propagation delay time (typ) (µs) 0.0107 Current consumption per channel (DC) (typ) (mA) 0.97 Current consumption per channel (1 Mbps) (typ) (mA) 1.53 Creepage (min) (mm) 3.7, 8 Clearance (min) (mm) 3.7, 8
SOIC (DW) 16 106.09 mm² 10.3 x 10.3 SSOP (DBQ) 16 29.4 mm² 4.9 x 6
  • 100 Mbps data rate
  • Robust isolation barrier:
    • >30-year projected lifetime at 1500 V RMS working voltage
    • Up to 5000 V RMS isolation rating
    • Up to 12.8 kV surge capability
    • ±100 kV/µs typical CMTI
  • Wide supply range: 2.25 V to 5.5 V
  • 2.25-V to 5.5-V Level translation
  • Default output high (ISO773x) and low (ISO773xF) options
  • Wide temperature range: –55°C to +125°C
  • Low power consumption, typical 1.5 mA per channel at 1 Mbps
  • Low propagation delay: 11 ns Typical (5-V Supplies)
  • 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) and QSOP (DBQ-16) package options
  • Automotive version available: ISO773x-Q1
  • Safety-related certifications:
    • DIN EN IEC 60747-17 (VDE 0884-17)
    • UL 1577 component recognition program
    • IEC 61010-1, IEC 62368-1, IEC60601-1, and GB 4943.1 certifications
  • 100 Mbps data rate
  • Robust isolation barrier:
    • >30-year projected lifetime at 1500 V RMS working voltage
    • Up to 5000 V RMS isolation rating
    • Up to 12.8 kV surge capability
    • ±100 kV/µs typical CMTI
  • Wide supply range: 2.25 V to 5.5 V
  • 2.25-V to 5.5-V Level translation
  • Default output high (ISO773x) and low (ISO773xF) options
  • Wide temperature range: –55°C to +125°C
  • Low power consumption, typical 1.5 mA per channel at 1 Mbps
  • Low propagation delay: 11 ns Typical (5-V Supplies)
  • 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) and QSOP (DBQ-16) package options
  • Automotive version available: ISO773x-Q1
  • Safety-related certifications:
    • DIN EN IEC 60747-17 (VDE 0884-17)
    • UL 1577 component recognition program
    • IEC 61010-1, IEC 62368-1, IEC60601-1, and GB 4943.1 certifications

The ISO773x devices are high-performance, triple-channel digital isolators with 5000 V RMS (DW package) and 3000 V RMS (DBQ package) isolation ratings per UL 1577.

This family includes devices with reinforced insulation ratings according to VDE, CSA, TUV and CQC. The ISO7731B device is designed for applications that require basic insulation ratings only.

The ISO773x family of devices 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 a double capacitive silicon dioxide (SiO 2) 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 and to reduce power consumption.

The ISO7730 device has all three channels in the same direction and the ISO7731 device has two forward and one reverse-direction channel. If the input power or signal is lost, the default output is high for devices without suffix F and low for devices with suffix F. See the Device Functional Modes section for further details.

Used in conjunction with isolated power supplies, this family of devices helps prevent noise currents on data buses, such as RS-485, RS-232, and CAN , or other circuits from entering the local ground and interfering with or damaging sensitive circuitry. Through innovative chip design and layout techniques, electromagnetic compatibility of the ISO773x device has been significantly enhanced to ease system-level ESD, EFT, surge, and emissions compliance. The ISO773x family of devices is available in 16-pin wide-SOIC and QSOP packages.

The ISO773x devices are high-performance, triple-channel digital isolators with 5000 V RMS (DW package) and 3000 V RMS (DBQ package) isolation ratings per UL 1577.

This family includes devices with reinforced insulation ratings according to VDE, CSA, TUV and CQC. The ISO7731B device is designed for applications that require basic insulation ratings only.

The ISO773x family of devices 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 a double capacitive silicon dioxide (SiO 2) 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 and to reduce power consumption.

The ISO7730 device has all three channels in the same direction and the ISO7731 device has two forward and one reverse-direction channel. If the input power or signal is lost, the default output is high for devices without suffix F and low for devices with suffix F. See the Device Functional Modes section for further details.

Used in conjunction with isolated power supplies, this family of devices helps prevent noise currents on data buses, such as RS-485, RS-232, and CAN , or other circuits from entering the local ground and interfering with or damaging sensitive circuitry. Through innovative chip design and layout techniques, electromagnetic compatibility of the ISO773x device has been significantly enhanced to ease system-level ESD, EFT, surge, and emissions compliance. The ISO773x family of devices is available in 16-pin wide-SOIC and QSOP packages.

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Technical documentation

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Type Title Date
* Data sheet ISO773x High-Speed, Robust-EMC Reinforced and Basic Triple-Channel Digital Isolators datasheet (Rev. I) PDF | HTML 17 Aug 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 CQC Certificate for ISOxxDBQ (Rev. A) 27 Mar 2023
Certificate CQC Certificate for ISOxxDWx (Rev. J) 27 Mar 2023
Certificate CSA Certificate for ISO77xxDW 13 Mar 2023
Certificate CSA Certificate for ISO77xxDBQ 03 Mar 2023
Application note IEC60601-1-2 Compliant Dig. Iso Design W/ 16-kV Contact Discharge ESD Protection PDF | HTML 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 Isolate Signal and Power for I2C (Rev. B) PDF | HTML 19 May 2021
EVM User's guide Universal Digital Isolator Evaluation Module PDF | HTML 04 Mar 2021
Functional safety information ISO7731-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA 18 Jun 2020
Technical article Top 6 design questions about I2C isolators PDF | HTML 13 Mar 2019
Technical article Designing a magnetically immune polyphase smart meter, part 3: comparing isolated PDF | HTML 29 Oct 2018
Technical article Designing a magnetically immune polyphase smart meter, part 2: an overview of isol PDF | HTML 18 Oct 2018
Technical article Designing a magnetically immune polyphase smart meter, part 1: isolated shunt sens PDF | HTML 04 Oct 2018
Application brief Considerations for Selecting Digital Isolators 24 Jul 2018
Analog Design Journal How to reduce radiated emissions of digital isolators for systems with RF module 26 Mar 2018
Analog Design Journal Designing an Isolated I2C Bus interface by using digital isolators (Rev. A) 13 Mar 2018
Technical article Be smart: select digital isolators for your smart meter PDF | HTML 19 Jul 2017
Application brief Reducing System Cost, Size and Power in Isolated DAQ Systems Using ADS122U04 (Rev. A) 15 Jun 2017
User guide ISO77xxDBQ Triple- and Quad-Digital Isolator Evaluation Module 02 Jun 2016
User guide ISO77xx Triple/Quad Digital Isolator Evaluation Module User's Guide 05 May 2016

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

ISO7741DBQEVM — ISO7741DBQ High Speed, Robust EMC Quad-Channel Digital Isolator Evaluation Module

ISO7741DBQEVM is an Evaluaiton Module used to evaluate the high performance, reinforced quad channel digital isolator ISO7741 in 16-Pin SSOP package (Package Code-DBQ). The EVM features enough test points & jumper options for one to evaluate the device with minimal external components.
User guide: PDF
Not available on TI.com
Evaluation board

ISO7741EVM — ISO7741 high-speed, robust EMC quad-channel digital isolator evaluation module

The ISO7741EVM is an evaluaiton module (EVM) to evaluate the ISO7741. The ISO7741 is a high-performance, reinforced quad-channel digital isolator in a wide-body SOIC package (package code DW). The EVM features enough test points and jumber options for you to evaluate the (...)
User guide: PDF
Not available on TI.com
Daughter card

TPS23881EVM-083 — IEEE 802.3bt ready PSE daughter card for 24-port PSE system

TPS23881EVM-008 is a 24-port (48-channel) daughter card to evaluate the TPS23881 which is a 4-pair, type-4, 8-channel Power-over-Ethernet (PoE) PSE with 200mΩ sense resistor. This daughter card provides evaluation and reference circuitry for the TPS23881 in high port count applications such (...)

Not available on TI.com
Daughter card

TPS23882EVM-084 — TPS23882 Type-3, 30W, 2-pair, PSE daughter card for 24-port PSE systems

TPS23882EVM-084 is a 24-port (24-channel) daughter card used to evaluate the TPS23882 which is a 2-pair, type-3, 8-channel Power-over-Ethernet (PoE) PSE with 200mΩ sense resistor. This daughter card provides evaluation and reference circuitry for the TPS23882 in high port count applications (...)

Simulation model

ISO7731 IBIS Model (Rev. A)

SLLM326A.ZIP (62 KB) - IBIS Model
Simulation model

ISO7731 PSpice Transient Model

SLLM479.ZIP (195 KB) - PSpice Model
Reference designs

TIDA-050026-23881 — 24-port (PoE 2, 4-pair) power sourcing equipment reference design for multi-port applications

This reference design showcases a Type-4 (PoE 2, 4-Pair) 24-port Ethernet switch for Power over Ethernet (PoE) applications which can send up to 90W per port for for IEEE 802.3bt (PoE 2) applications and up to 120W per port for non-standard applications. Based on the MSP430F523x family, our (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-050026-23882 — 24-port (PoE 2, 2-pair) power sourcing equipment reference design for multi-port applications ;

This reference design showcases a Type-3, 30W, 2-Pair 24-port Ethernet switch for Power over Ethernet (PoE) applications which can send up to 30W per port for IEEE 802.3bt Type 3 applications and up to 60W per port for non-standard applications. Based on the MSP430F523x family, TI's TPS2388x (...)
Design guide: PDF
Schematic: PDF
Reference designs

PMP23069 — 3-kW, 180-W/in3 single-phase totem-pole bridgeless PFC reference design with 16-A max input

This reference design demonstrates a method to control a continuous conduction mode Totem pole power factor correction converter (PFC) using C2000 F28003x and F28004x microcontrollers. The PFC also works as inverter in grid connected (current controlled) mode. The converter is designed to support a (...)
Test report: PDF
Reference designs

TIDA-010216 — 16s battery pack reference design with low-side MOSFET control for large capacity applications

This reference design is a low standby and ship-mode current consumption and high cell voltage accuracy 16s Lithium-ion (Li-ion) LiFePO4 battery pack. The design monitors each cell voltage, pack current, cell and MOSFET temperature with high accuracy and protects the Li-ion and LiFePO4 battery (...)
Design guide: PDF
Reference designs

PMP23249 — 650-V 30-mΩ GaN FET daughter card reference design

This reference design features two LMG352XR0X0 650-V GaN FETs with an integrated driver and protection in a half-bridge configuration with all the required bias circuit and logic or power level shifting. Power stage, gate-driving, high-frequency current loops are fully enclosed on the board to (...)
Test report: PDF
Reference designs

TIDA-010036 — One-phase shunt electricity meter reference design using standalone ADCs

This reference design implements Class 0.5 single-phase energy measurement using standalone multi-channel analog-to-digital converters (ADC) to sample a shunt current sensor. With the combination of the shunt sensor and a compact magnetically immune power supply, the design provides protection (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-010037 — High accuracy split-phase CT electricity meter reference design using standalone ADCs

This reference design implements Class 0.1 split-phase energy measurement using high-performance, multi-channel analog-to-digital converters (ADC). The independent ADC samples the output of current transformers (CT) at 8 kHz to measure the current and voltage of each leg of the AC mains. The (...)
Design guide: PDF
Schematic: PDF
Package Pins Download
SOIC (DW) 16 View options
SSOP (DBQ) 16 View options

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