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Digital Isolator CMOS 3-CH 100Mbps 16-Pin SSOP T/R

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ISO7731DBQR General Description

The ISO773x devices are high-performance, triple-channel digital isolators with 5000 VRMS (DW package) and 3000 VRMS (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 (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 and to reduce power consumption.

Texas Instruments, Inc Inventory

Key Features

  • 100 Mbps data rate
  • Robust isolation barrier:
    • >100-year projected lifetime at 1500 VRMS working voltage
    • Up to 5000 VRMS 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
Texas Instruments, Inc Original Stock
Texas Instruments, Inc Inventory


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 Pin Count 16
Package Category Small Outline Packages Released Date Nov 15, 2021
Last Modified Date Mar 7, 2023 4:10 PM UTC


Shipping Method

Our products are mainly transported and delivered by DHL, FedEx, UPS and other logistics partners on site -- Available to 200+ countries.

Delivery Time

The delivery time is usually within 2-7 days, depending on the logistics provider and the area of delivery.

The following are the estimated delivery times of some logistics service providers.

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Checks and other instruments are not supported to pay for orders and customers are required to pay all possible fees, including sales tax,
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Our policies and procedures are designed to ensure compliance with various quality specifications and to quickly resolve quality-related issues.

We promise to provide 365 days quality assurance service for all our products.

If you have any dissatisfaction with the quality of the product you received, you can contact us for a refund or exchange, as long as the product is kept in its original condition.


AVAQ determines and packages all devices based on electrostatic discharge (ESD) and moisture sensitivity level (MSL) protection requirements.
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Buying Guide

  • What is the lifespan of ISO7731DBQR?

    The lifespan of ISO7731DBQR depends on various factors such as the quality of materials used, operating conditions, and the manufacturer's recommended usage time. The datasheet provided by the manufacturer specifies the expected lifespan of the product.

  • Where can I find the full specification of ISO7731DBQR?

    You can find it with PDF Datasheet for ISO7731DBQR on this page. If it is not available, you can contact Avaq at [email protected] to inquire about the Datasheet for this part.

  • How to check the quality of ISO7731DBQR?

    Avaq has separate quality services with common quality inspection equipment for testing items, you can also fill out a sample form, our team will get in touch with you within 24 HOURS.

  • Can I purchase samples for testing?

    Avaq offers free samples for customers to test. This can often help you determine whether the chip or component meets your needs.

  • Where can I check the delivery after the order is completed?

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