ISO7421E-Q1

ACTIVE

Automotive, dual-channel, 1/1, 50-Mbps digital isolator

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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) 50 Rating Automotive Surge voltage capability (Vpk) 4000 Current consumption per channel (DC) (Typ) (mA) 1.8 Current consumption per channel (1 Mbps) (Typ) (mA) 1.8 Operating temperature range (C) -40 to 125 Default output High Supply voltage (Max) (V) 5 Supply voltage (Min) (V) 3.3 Propagation delay (Typ) (ns) 9 open-in-new Find other Digital isolators

Package | Pins | Size

SOIC (DW) 16 77 mm² 10.3 x 7.5 open-in-new Find other Digital isolators

Features

  • Qualified for automotive applications
  • AEC-Q100 Qualified with the following results:
    • Device temperature grade 1: -40°C to +125°C ambient operating temperature range
    • Device HBM ESD classification level H3A
    • Device CDM ESD classification level C4
  • Propagation delay less than 20 ns
  • Low power consumption
  • Safety and regulatory approvals
    • 4242 VPK Isolation per VDE, 2.5 kVrms isolation per UL 1577, CSA approved per IEC 60950-1 and IEC 61010-1 End Equipment Standards
  • 50 kV/µs Transient immunity typical
  • Operates from 3.3 V or 5 V Supply and logic levels
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Description

The ISO7421E-Q1 provides double galvanic isolation of up to 2.5 KVrms for 1 minute per UL. This digital isolator has two isolation channels in a bi-directional configuration. Each isolation channel has a logic input and output buffer separated by a silicon oxide (SiO2) insulation barrier. Used in conjunction with isolated power supplies, these devices prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry.

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

Note: The ISO7421E-Q1 is specified for signaling rates up to 50 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
* Data sheet Low-power dual digital isolators datasheet (Rev. C) Feb. 07, 2019
White paper Distance Through Insulation: How Digital Isolators Meet Certification Requiremen Jun. 11, 2021
Application note How to Replace Optocouplers with Digital Isolators in Standard Interface Circuit (Rev. A) May 19, 2021
User guide Universal Digital Isolator Evaluation Module Mar. 04, 2021
White paper Improve Your System Performance by Replacing Optocouplers with Digital Isolators (Rev. A) Dec. 07, 2020
Technical article How to select the right digital isolator for your design Oct. 21, 2020
Technical article Why signal isolation matters in 48-V HEV/EV systems Nov. 20, 2019
Technical article Staying on budget: How digital isolators are transforming field transmitters May 24, 2019
Technical article What are isolated digital inputs? Mar. 08, 2019
Application note Considerations for Selecting Digital Isolators Jul. 24, 2018

Design & development

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

Hardware development

EVALUATION BOARD Download
document-generic User guide
29
Description

DIGI-ISO-EVM is an evaluaiton module used to evaluate any of the TI signle-channel, dual-channel, triple-channel, quad-channel or six-channel digital isolator devices in five different packages - 8-pin NB SOIC (D), 8-pin WB SOIC (DWV), 16-pin WB SOIC (DW), 16-pin ultra WB SOIC (DWW) and 16-pin QSOP (...)

Features
  • Any TI digital isolator can be evaluated
  • Supports single-channel, dual-channel, triple-channel, quad-channel and six-channel devices
  • Supports D, DWV, DW, DWW and DBQ packages
  • Various Berg pins provided for easy testing
EVALUATION BOARD Download
ISO722X EVM Bench
ISO722XEVM
document-generic User guide
49
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 MODEL Download
SLLM136.ZIP (26 KB) - IBIS Model

CAD/CAE symbols

Package Pins Download
SOIC (DW) 16 View options

Ordering & quality

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  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

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