ISO6731 General-Purpose Triple-Channel Digital Isolator with Robust EMC

1 Features

• 50 Mbps data rate

• Robust isolation barrier:

– Up to 10 kV surge capability

– ±75 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 (pending):

– DIN V VDE 0884-11:2017-01

– UL 1577 component recognition program

– IEC 60950-1, IEC 62368-1, IEC 61010-1,

IEC60601-1 and GB 4943.1-2011 certifications

2 Applications

• Power supplies

• Grid, Electricity meter

• Motor drives

• Factory automation

• Building automation

• Lighting

• Appliances

3 Description

The ISO6731 device is a high-performance, triple-

channel digital isolators ideal for cost-sensitive

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

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.

Device Information

PART NUMBER (1)

PACKAGE

BODY SIZE (NOM)

ISO6731, ISO6731F SOIC (DW)

10.30 mm × 7.50

mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

OUTx

GNDO

GNDI

Series Isolation

Capacitors

Copyright © 2016, Texas Instruments Incorporated

INx

ENx

GNDI=Input ground, GNDO=Output ground

Simplified Schematic

www.ti.com

ISO6731

SLASEY9 – JANUARY 2021

Copyright © 2021 Texas Instruments Incorporated

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ISO6731

SLASEY9 – JANUARY 2021

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. ADVANCE INFORMATION for preproduction products; subject to change

without notice.