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ISO7420E, ISO7420FE, ISO7421E, ISO7421FE

SLLSE45F – DECEMBER 2010 – REVISED JULY 2015

ISO742x Low-Power Dual Channel Digital Isolators

1 Features

3 Description

ISO742x provide galvanic isolation up to 2500 VRMS

1

•

Signaling Rate > 50 Mbps

for 1 minute per UL and 4242 VPK per VDE. These

•

Default Output 'High' and 'Low' Options

devices have two isolated channels. Each channel

•

Low Power Consumption: Typical ICC per Channel

has a logic input and output buffer separated by a

(3.3-V Supplies):

silicon dioxide (SiO2) insulation barrier. Used in

conjunction with isolated power supplies, these

–

ISO7420: 1.4 mA at 1 Mbps, 2.5 mA at

devices prevent noise currents on a data bus or other

25 Mbps

circuit from entering the local ground and interfering

–

ISO7421: 1.8 mA at 1 Mbps, 2.8 mA at

with or damaging sensitive circuitry. ISO7420 has

25 Mbps

both channels in the same direction while ISO7421

has the two channels in opposite direction. In case of

•

Low Propagation Delay: 7 ns Typical

input power or signal loss, default output is 'low' for

•

Low Pulse Skew: 200 ps Typical

devices with suffix 'F' and 'high' for devices without

•

Wide TA Range Specified: –40°C to 125°C

suffix 'F'. ISO742x have no integrated noise filter and

•

50-KV/

μs Transient Immunity, Typical

thus have fast propagation delays.

•

Isolation Barrier Life: > 25 Years

These devices have TTL input thresholds and

•

Operates from 3-V to 5.5-V Supply Levels

operate from 3-V to 5.5-V supplies. All inputs are 5-V

tolerant when supplied from a 3.3-V supply.

•

3.3-V and 5-V Level Translation

•

Narrow Body SOIC-8 Package

Device Information(1)

•

Safety and Regulatory Approvals:

PART NUMBER

PACKAGE

BODY SIZE (NOM)

–

4242 VPK Isolation per DIN V VDE V 0884-10

ISO7420E

and DIN EN 61010-1

ISO7420FE

SOIC (8)

4.90 mm x 3.91 mm

–

2500 VRMS Isolation for 1 minute per UL 1577

ISO7421E

–

CSA Component Acceptance Notice 5A, IEC

ISO7421FE

60950-1 and IEC 61010-1 Standards

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

–

CQC Certification per GB4943.1-2011

–

Simplified Schematic

2 Applications

•

Opto-Coupler Replacement in:

–

Industrial FieldBus

–

ProfiBus

–

ModBus

–

DeviceNet™ Data Buses

–

Servo Control Interface

–

Motor Control

VCCI and GNDI are supply and ground

connections respectively for the input

–

Power Supplies

channels.

–

Battery Packs

VCCO and GNDO are supply and ground

connections respectively for the output

channels.

1

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.