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Product details

Parameters

Integrated isolated power No Number of channels (#) 2 Forward/reverse channels 1/1 Isolation rating (Vrms) 2500 Data rate (Max) (Mbps) 1 Rating Catalog VCC (Max) (V) 5 Surge voltage capability (Vpk) 4000 Current consumption per channel (DC) (Typ) (mA) 1.5 Current consumption per channel (1 Mbps) (Typ) (mA) 1.5 Operating temperature range (C) -40 to 125 VCC (Min) (V) 3.3 Default output High Propagation delay (Typ) (ns) 9 open-in-new Find other Digital isolators

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 open-in-new Find other Digital isolators

Features

  • Highest Signaling Rate: 1 Mbps
  • Low Power Consumption, Typical ICC per Channel (3.3-V operation):
    • ISO7420: 1.1 mA, ISO7421: 1.5 mA
  • Low Propagation Delay – 9 ns Typical
  • Low Skew – 300 ps Typical
  • Wide TA Range: –40°C to 125°C (M-Grade)
  • 50-kV/μs Transient Immunity, Typical
  • Over 25-Year Isolation Integrity at Rated Voltage
  • Operates From 3.3-V and 5-V Supply and Logic Levels
  • 3.3-V and 5-V Level Translation
  • Narrow Body SOIC-8 Package
  • Safety and Regulatory Approvals:
    • 4242 VPK Isolation per DIN V VDE V 0884-10 and DIN EN 61010-1
    • 2500 VRMS Isolation for 1 minute per UL 1577
    • CSA Component Acceptance Notice 5A, IEC 60950-1 and IEC 61010-1 Standards
    • CQC Certification per GB4943.1-2011

All other trademarks are the property of their respective owners

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Description

The ISO7420, ISO7420M and ISO7421 provide galvanic isolation up to 2500 VRMS for 1 minute per UL. These digital isolators have two isolated channels. Each isolation channel has a logic input and output buffer separated by a silicon dioxide (SiO2) insulation barrier. Used in conjunction with isolated power supplies, these devices prevent noise currents on a data bus or other circuit from entering the local ground and interfering with or damaging sensitive circuitry. The suffix M indicates wide temperature range (–40°C to 125°C).

These devices have TTL input thresholds and require two supply voltages, 3.3 or 5 V, or any combination. All inputs are 5-V tolerant when supplied from a 3.3-V supply.

Note: The ISO7420 and ISO7421 are specified for signaling rates up to 1 Mbps. Due to their fast response time, under most cases, these devices will also transmit data with much shorter pulse widths. Designers should add external filtering to remove spurious signals with input pulse duration <20 ns if desired.

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Technical documentation

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Type Title Date
* Datasheet ISO742x Low-Power Dual-Channel Digital Isolators datasheet (Rev. I) Jul. 16, 2015
Technical articles What the DIN VDE V 0884-11:2017-01 standard means for your isolated designs Feb. 27, 2020
Technical articles Isolation 101: How to find the right isolation solution for your application Feb. 11, 2020
Technical articles Why signal isolation matters in 48-V HEV/EV systems Nov. 20, 2019
More literature CSA Certification (Rev. P) Nov. 19, 2019
Technical articles Solving lifetime and temperature challenges in AC motor drives with capacitive-based isolation Nov. 01, 2019
More literature VDE certificate for basic isolation for DIN VDE V 0884-11:2017-01 (Rev. Q) Sep. 20, 2019
More literature CQC Certification (Rev. F) Sep. 13, 2019
More literature UL Certification (Rev. N) Jul. 30, 2019
User guides Dual-Channel Digital Isolator EVM (Rev. D) Jul. 08, 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
ISO722X EVM Bench
ISO722XEVM
$49.00
Description

This evaluation module (EVM) is used for testing the parametrics of the factory installed ISO7421 dual channel isolator. The EVM may be reconfigured by the user for use with any of the ISO7220X, ISO7221X or ISO742X dual channel isolators.

Features
  • 1,5,25 and 150-Mbps Signaling Rate Options
  • -Low Channel-to-Channel Output Skew; 1 ns max

    -Low Pulse Width Distortion (PWD); 1 ns max

    -Low Jitter Content: 1 ns Typ at 150Mbps

  • Typical 25 Year life at Rated Voltage
  • 4000Vpeak Isolation, 560Vpeak Viorm
  • - UL 1577, IEC 60747-5-2 VDE 0884, Rev 2), IEC 61010-1 (...)

Design tools & simulation

SIMULATION MODELS Download
SLOM200A.ZIP (28 KB) - IBIS Model

Reference designs

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16-Bit Analog Mixed Input and Output Module for Programmable Logic Controller (PLC) Reference Design
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CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options

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