Home Isolation Digital isolators
Home
Isolation
Digital isolators

ISO7421A-Q1

ACTIVE

Automotive, 2-channel, 1/1, digital isolator

Order now
Data sheet

A newer version of this product is available

open-in-new Compare alternates
Drop-in replacement with upgraded functionality to the compared device.
ISO6721-Q1 ACTIVE Automotive, 2-channel, 1/1, digital isolator with 50Mbps and 1.8V logic support Pin-to-pin upgrade with higher isolation, stronger CMTI, wider supply range and better immunity

ISO7421A-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Integrated isolated power No Number of channels 2 Forward/reverse channels 1 forward / 1 reverse Data rate (max) (Mbps) 50 Protocols GPIO, PWM, UART Propagation delay time (typ) (ns) 9 Certifications CQC, CSA, DIN Isolation rating Basic Withstand isolation voltage (VISO) (Vrms) 2500 Surge isolation voltage (VIOSM) (kVPK) 4 CMTI (min) (kV/µs) 25 Default output High Creepage (min) (mm) 4 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 Transient isolation voltage (VIOTM) (VPK) 4242 Clearance (min) (mm) 4
Rating Automotive Integrated isolated power No Number of channels 2 Forward/reverse channels 1 forward / 1 reverse Data rate (max) (Mbps) 50 Protocols GPIO, PWM, UART Propagation delay time (typ) (ns) 9 Certifications CQC, CSA, DIN Isolation rating Basic Withstand isolation voltage (VISO) (Vrms) 2500 Surge isolation voltage (VIOSM) (kVPK) 4 CMTI (min) (kV/µs) 25 Default output High Creepage (min) (mm) 4 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 Transient isolation voltage (VIOTM) (VPK) 4242 Clearance (min) (mm) 4
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • 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 C5
  • High Signaling Rate: 50 Mbps
  • Low Power Consumption
  • Low Propagation Delay – 9 ns (Typical)
  • Low Skew – 300 ps (Typical)
  • 4-kVpeak Maximum Isolation, 2.5 kVrms per UL 1577,
    IEC/VDE and CSA Approved, IEC 60950-1, IEC 61010-1
    End Equipment Standards Approved. All Approvals Pending.
  • 50 kV/µs Transient Immunity (Typical)
  • Over 25-Year Isolation Integrity at Rated Voltage
  • Operates From 3-V to 5.5-V Supply and Logic Levels
  • 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 C5
  • High Signaling Rate: 50 Mbps
  • Low Power Consumption
  • Low Propagation Delay – 9 ns (Typical)
  • Low Skew – 300 ps (Typical)
  • 4-kVpeak Maximum Isolation, 2.5 kVrms per UL 1577,
    IEC/VDE and CSA Approved, IEC 60950-1, IEC 61010-1
    End Equipment Standards Approved. All Approvals Pending.
  • 50 kV/µs Transient Immunity (Typical)
  • Over 25-Year Isolation Integrity at Rated Voltage
  • Operates From 3-V to 5.5-V Supply and Logic Levels

The ISO7421A-Q1 provides galvanic isolation up to 2.5 kVrms for 1 minute per UL. This digital isolator has two isolated channels with bidirectional channel configuration. 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 devices have TTL input thresholds and require two supply voltages from 3 V to 5.5 V, or any combination. All inputs are 5-V tolerant when supplied from a 3-V supply.

The ISO7421A-Q1 provides galvanic isolation up to 2.5 kVrms for 1 minute per UL. This digital isolator has two isolated channels with bidirectional channel configuration. 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 devices have TTL input thresholds and require two supply voltages from 3 V to 5.5 V, or any combination. All inputs are 5-V tolerant when supplied from a 3-V supply.
filter Find other Digital isolators
Download View video with transcript Video

Technical documentation

No results found. Please clear your search and try again.
View all 9
Top documentation Type Title Format options Date
* Data sheet Low-Power Dual-Channel Isolators, ISO7420-Q1, ISO7421A-Q1 datasheet (Rev. B) Sep 12, 2013
Certificate VDE Certificate for Basic Isolation for DIN EN IEC 60747-17 (Rev. AA) Jun 11, 2026
White paper Improve Your System Performance by Replacing Optocouplers with Digital Isolators (Rev. D) PDF | HTML Nov 7, 2025
Certificate CSA Certificate for ISO742xD Mar 15, 2023
Certificate UL Certificate of Compliance File E181974 Vol 4 Sec 3 Aug 8, 2022
White paper Why are Digital Isolators Certified to Meet Electrical Equipment Standards? Nov 16, 2021
White paper Distance Through Insulation: How Digital Isolators Meet Certification Requiremen PDF | HTML Jun 11, 2021
Application brief How to Replace Optocouplers with Digital Isolators in Standard Interface Circuit (Rev. A) PDF | HTML May 19, 2021
Application brief 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.

Evaluation board

DIGI-ISO-EVM — Universal digital isolator evaluation module

DIGI-ISO-EVM is an evaluation module (EVM) used to evaluate any of the TI single-channel, dual-channel, triple-channel, quad-channel or six-channel digital isolator devices in five different packages - 8-pin narrow-body SOIC (D), 8-pin wide-body SOIC (DWV), 16-pin wide-body SOIC (DW), 16-pin ultra- (...)

User guide: PDF | HTML
Supported products & hardware
In stock
Limit:
??asset.out-of-stock-ti_en_US??
Not available
Simulation model

ISO7421 IBIS Model (Rev. A)

SLOM200 (27 KB) - IBIS model
Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
SOIC (D) 8 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos