V

CC1

OUTA

INB

GND1

V

CC2

INA

OUTB

GND2

ISO7421

D Package

(Top View)

1

2

3

4

8

7

6

5

V

CC1

INA

INB

GND1

V

CC2

OUTA

OUTB

GND2

ISO7420

D Package

(Top View)

1

2

3

4

8

7

6

5

ISO7420E, ISO7420FE

ISO7421E, ISO7421FE

www.ti.com

SLLSE45E – DECEMBER 2010 – REVISED JANUARY 2013

Low-Power Dual Channel Digital Isolators

Check for Samples: ISO7420E, ISO7420FE, ISO7421E, ISO7421FE

1

FEATURES

APPLICATIONS

2

•

Signaling Rate > 50 Mbps

•

Opto-Coupler Replacement in:

•

For Devices with Suffix F, Output is Low in

–

Industrial FieldBus

Default Mode

–

ProfiBus

•

–

ModBus

Channel (3.3V Supplies):

–

DeviceNet™ Data Buses

–

ISO7420: 1.4 mA at 1 Mbps, 2.5 mA at

–

Servo Control Interface

25 Mbps

–

Motor Control

–

ISO7421: 1.8 mA at 1 Mbps, 2.8 mA at

–

Power Supplies

25 Mbps

–

Battery Packs

•

Low Propagation Delay: 7 ns Typical (E-Grade)

•

Low Pulse Skew: 200 ps Typical (E-Grade)

SAFETY AND REGULATORY

•

APPROVALS

•

50 KV/

μs Transient Immunity, Typical

•

•

Isolation Barrier Life: > 25 Years

60747-5-2 (VDE 0884 Part 2)

•

Operates from 3V to 5.5V Supply Levels

•

•

Narrow Body SOIC-8 Package

•

CSA Component Acceptance Notice #5A

•

IEC 60950-1 and IEC 61010-1 End Equipment

Standards

•

All Agencies Approvals Completed

DESCRIPTION

These devices have two isolated channels. Each channel has a logic input and output buffer separated by a

noise currents on a data bus or other circuit from entering the local ground and interfering with or damaging

sensitive circuitry. The suffix F indicates low-output option in fail-safe conditions (see Table 1). E-grade devices

have no integrated noise filter and thus have fast propagation delays. CC-grade devices have integrated 10ns-

filters for harsh environments where short noise pulses may be present at the device input pins.

These devices have TTL input thresholds and operate from 3V to 5.5V supplies. All inputs are 5V tolerant when

supplied from a 3.3V supply.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

DeviceNet is a trademark of Texas Instruments.

UNLESS

OTHERWISE

NOTED

this

document

contains

Copyright © 2010–2013, Texas Instruments Incorporated

PRODUCTION DATA information current as of publication date.

Products conform to specifications per the terms of Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.