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

SLLSE45B – DECEMBER 2010 – REVISED JANUARY 2011

Low-Power Dual Channel Digital Isolators

Check for Samples: ISO7420E, ISO7420FE, ISO7421E, ISO7421FE

1

FEATURES

APPLICATIONS

•

Opto-Coupler Replacement in:

2

•

Signaling Rate > 50 Mbps

–

Industrial FieldBus

•

For Devices with Suffix F, Output is Low in

–

ProfiBus

Fail-Safe Mode

–

ModBus

•

–

DeviceNet™ Data Buses

Channel (3.3V Supplies):

–

Servo Control Interface

–

ISO7420: 1.4 mA at 1 Mbps, 2.5 mA at 25

Mbps

–

Motor Control

–

Power Supplies

–

ISO7421: 1.8 mA at 1 Mbps, 2.8 mA at 25

Mbps

–

Battery Packs

•

Low Propagation Delay: 7 ns (Typical)

SAFETY AND REGULATORY

•

Low Pulse Skew: 200 ps (Typical)

APPROVALS

•

•

•

50 KV/ms Transient Immunity, Typical

•

CSA Component Acceptance Notice 5A

•

Isolation Barrier Life: > 25 Years

•

IEC 60747-5-2 (VDE 0884 Rev. 2)

•

Operates from 3V to 5.5V Supply Levels

•

IEC 60950-1 and IEC 61010-1 End Equipment

•

Narrow Body SOIC-8 Package

Standards

•

All Approvals Pending

DESCRIPTION

UL. 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 condition (see Table 1).

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 © 2010–2011, 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.