ISO7342FCDW Digital Isolator Equivalent & Substitute Parts

Part Overview

The ISO7342FCDW is a general purpose digital isolator manufactured by Texas Instruments, designed for galvanic isolation applications requiring 3000Vrms isolation voltage. This capacitive coupling technology isolator features 4 channels with unidirectional signal paths, supporting data rates up to 25Mbps with 25kV/µs common mode transient immunity. The device is packaged in a 16-SOIC surface mount package and operates across the industrial temperature range of -40°C to 125°C. The ISO7342FCDW maintains Active product status and is ROHS3 compliant, making it suitable for modern electronic applications requiring isolation in industrial, automotive, and communication systems.

Substitute parts are identified when they maintain identical electrical specifications, mechanical compatibility, and compliance certifications, ensuring direct functional replacement without circuit redesign.

Substiute Parts

ISO7342FCDW

Texas InstrumentsIn Stock: 1684ISO7342FCDW Datasheet

Current PartRFQ

ISO7342CDW

Texas InstrumentsIn Stock: 58815ISO7342CDW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ISO7342FCDW are identified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution logic is based on the following key parameters that must remain identical:

Isolation voltage rating (3000Vrms), number of channels (4), channel configuration (2/2 unidirectional), data rate (25Mbps), common mode transient immunity (25kV/µs), supply voltage range (3V ~ 5.5V), operating temperature range (-40°C ~ 125°C), package type (16-SOIC with 0.295" / 7.50mm width), and compliance certifications (ROHS3, REACH Unaffected).

The ISO7342CDW meets all these criteria and is therefore classified as a parametric equivalent. Both parts share the same base product number (ISO7342), identical electrical performance characteristics, and mechanical compatibility, enabling direct substitution in applications where the ISO7342FCDW is specified.

Parameter Comparison

Engineering Selection Recommendations

The ISO7342CDW is a direct parametric equivalent to the ISO7342FCDW and qualifies as a substitute part based on complete electrical and mechanical specification alignment. Both devices maintain Active product status, ensuring continued manufacturer support and availability. Both parts carry identical compliance certifications including ROHS3 compliance and REACH Unaffected status, meeting regulatory requirements for modern electronic applications.

Selection between ISO7342FCDW and ISO7342CDW should be based on inventory availability and lead time considerations, as both parts deliver identical functional performance and mechanical compatibility in 16-SOIC surface mount applications requiring 3000Vrms galvanic isolation with 4-channel unidirectional signal paths.

Frequently Asked Questions (FAQ)

Q: Can ISO7342CDW be used as a direct replacement for ISO7342FCDW in existing designs?

A: Yes. The ISO7342CDW is a parametric equivalent with identical electrical specifications, isolation voltage, channel configuration, data rate, timing characteristics, supply voltage range, operating temperature range, and package dimensions. No circuit modifications are required.

Q: Are there any differences in compliance or certifications between these parts?

A: No. Both ISO7342FCDW and ISO7342CDW carry identical ROHS3 compliance and REACH Unaffected status, ensuring equivalent regulatory compliance for applications in regulated industries.

Q: What is the significance of the different part number suffixes (FCDW vs CDW)?

A: The suffix designations reflect internal Texas Instruments product line classifications. Both parts share the same base product number (ISO7342) and deliver identical electrical performance and mechanical compatibility. The suffix does not indicate functional differences relevant to circuit design or application compatibility.

Q: Are both parts available in the same packaging format?

A: Yes. Both ISO7342FCDW and ISO7342CDW are supplied in 16-SOIC surface mount packages with identical dimensions (0.295" / 7.50mm width) and identical Moisture Sensitivity Level (MSL 2, 1 Year). PCB footprints and assembly processes are identical.

Q: What isolation voltage do these parts provide?

A: Both parts provide 3000Vrms galvanic isolation with 25kV/µs common mode transient immunity, suitable for applications requiring high-voltage isolation between circuit domains.

Q: What is the maximum data rate supported?

A: Both parts support data rates up to 25Mbps with propagation delays of 58ns maximum (tpLH and tpHL) and pulse width distortion of 4ns maximum.

Q: What supply voltage range is supported?

A: Both parts operate across a 3V to 5.5V supply voltage range, compatible with standard 3.3V and 5V logic systems.