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ISO7421-EP

SLLSEN3 – DECEMBER 2015

ISO7421-EP Low-Power Dual Digital Isolators

1 Features

3 Description

The ISO7421-EP device provides galvanic isolation

1

•

Highest Signaling Rate: 1 Mbps

up to 2500 VRMS for 1 minute per UL. The ISO7421-

•

Low Power Consumption, Typical ICC per Channel

EP device has two isolated channels. Each isolation

(3.3-V Operation): 1.5 mA

channel has a logic input and output buffer separated

•

Low Propagation Delay – 9 ns Typical

by a silicon dioxide (SiO2) insulation barrier. Used in

conjunction with isolated power supplies, the device

•

Low Skew – 300 ps Typical

prevents noise currents on a data bus or other circuit

•

Wide TJ Range: –55°C to 136°C

from entering the local ground and interfering with or

•

50-kV/

μs Transient Immunity, Typical

damaging sensitive circuitry.

•

Over 25-Year Isolation Integrity at Rated Voltage

This device have TTL input thresholds and require

•

Operates From 3.3-V and 5-V Supply and Logic

two supply voltages, 3.3 or 5 V, or any combination.

Levels

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

The ISO7421-EP device is specified for signaling

rates up to 1 Mbps. Due to its fast response time,

•

Safety and Regulatory Approvals:

under most cases, this device will also transmit data

–

4242 VPK Isolation per DIN V VDE V 0884-10

with much shorter pulse widths. Designers should

and DIN EN 61010-1

add external filtering to remove spurious signals with

–

2500 VRMS Isolation for 1 minute per UL 1577

input pulse duration <20 ns if desired.

–

CSA Component Acceptance Notice 5A, IEC

Device Information(1)

60950-1 and IEC 61010-1 Standards

PART NUMBER

PACKAGE

BODY SIZE (NOM)

–

CQC Certification per GB4943.1-2011

ISO7421-EP

SOIC (8)

4.90 mm × 3.91 mm

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

2 Applications

the end of the data sheet.

•

Optocoupler Replacement in:

–

Industrial Fieldbus

–

Profibus

–

Modbus

–

DeviceNet™ Data Buses

–

Servo Control Interface

–

Motor Control

–

Power Supplies

–

Battery Packs

Conceptual Block Diagram of a Digital Capacitive Isolator

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.