ISO773x High-Speed, Robust-EMC Reinforced and Basic Triple-Channel Digital

Isolators

1 Features

• 100Mbps data rate

• Robust isolation barrier:

– >30-year projected lifetime at 1500VRMS

working voltage

– Up to 5000VRMS isolation rating

– Up to 12.8kV surge capability

– ±100kV/μs typical CMTI

• Wide supply range: 2.25V to 5.5V

• 2.25V to 5.5V Level translation

• Default output high (ISO773x) and low (ISO773xF)

options

• Wide temperature range: –55°C to +125°C

• Low power consumption, typical 1.5mA per

channel at 1Mbps

• Low propagation delay: 11ns Typical (5V 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

2 Applications

• Industrial automation

• Motor control

• Power supplies

• Solar inverters

• Medical equipment

3 Description

The ISO773x devices are high-performance, triple-

channel digital isolators with 5000VRMS (DW package)

and 3000VRMS (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-controller 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.

Package Information

PART NUMBER

PACKAGE(1)

PACKAGE SIZE(2)

ISO7730

ISO7731

SOIC (DW)

10.30mm × 7.50mm

SSOP (DBQ)

4.90mm × 3.90mm

ISO7731B

SOIC (DW)

10.30mm × 7.50mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

(2)

The package size (length × width) is a nominal value and

includes pins, where applicable.

OUTx

GNDO

GNDI

VCCO

VCCI

Series Isolation

Capacitors

Copyright © 2016, Texas Instruments Incorporated

INx

ENx

VCCI=Input supply, VCCO=Output supply

GNDI=Input ground, GNDO=Output ground

Simplified Schematic

ISO7730, ISO7731

SLLSES0K – SEPTEMBER 2016 – REVISED SEPTEMBER 2025

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.