ISO672x General Purpose Basic Dual-Channel Digital Isolators with Robust EMC

1 Features

• Functional Safety-Capable

– Documentation available to aid functional safety

system design: ISO6720, ISO6721

• 50-Mbps data rate

• Robust isolation barrier:

– ±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 (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 VDE V 0884-11:2017-01

– UL 1577 component recognition program

– IEC 62368-1, IEC 61010-1, IEC 60601-1

– GB 4943.1-2011

2 Applications

• Power supplies

• Grid, Electricity meter

• Motor drives

• Factory automation

• Building automation

• Lighting

• Appliances

3 Description

The ISO672xB devices are high-performance, dual-

channel digital isolators ideal for cost sensitive

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

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.

Device Information

PART NUMBER(1)

PACKAGE

BODY SIZE (NOM)

ISO6720B, ISO6720FB

D (8)

4.90 mm x 3.91 mm

ISO6721B, ISO6721FB

ISO6721RB, ISO6721RFB

(1)

For all available packages, see the orderable addendum at

the end of the datasheet.

OUTx

GNDO

GNDI

Series Isolation

Capacitors

Copyright © 2016, Texas Instruments Incorporated

INx

GNDI=Input ground, GNDO=Output ground

Simplified Schematic

ISO6720, ISO6721, ISO6721R

SLLSFJ0D – JANUARY 2020 – REVISED SEPTEMBER 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. PRODUCTION DATA.