ISO7842DWW Equivalent & Substitute Parts

Part Overview

The ISO7842DWW is a General Purpose Digital Isolator manufactured by Texas Instruments, featuring 5700Vrms isolation voltage and 4-channel unidirectional configuration. This component is designed for applications requiring galvanic isolation with high common mode transient immunity and fast data transmission. The part maintains Active product status with full ROHS3 compliance and REACH unaffected designation, ensuring continued availability and regulatory compliance for new designs.

Substitute parts are identified based on matching electrical performance parameters, mechanical compatibility, and manufacturing specifications that enable direct functional replacement without circuit redesign.

Substiute Parts

ISO7842DWW

Texas InstrumentsIn Stock: 783ISO7842DWW Datasheet

Current PartRFQ

ISO7842FDWW

Texas InstrumentsIn Stock: 89226ISO7842FDWW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ISO7842DWW are identified through parametric equivalence matching. The substitution logic is based on the following critical parameters that must remain identical:

• Isolation voltage rating: 5700Vrms
• Channel count and configuration: 4 channels, unidirectional (2/2)
• Data rate capability: 100Mbps minimum
• Common mode transient immunity: 100kV/µs minimum
• Propagation delay specifications: 16ns maximum (both rising and falling edges)
• Supply voltage compatibility: 2.25V ~ 5.5V range
• Package form factor: 16-SOIC (0.551", 14.00mm Width)
• Technology platform: Capacitive Coupling

The ISO7842FDWW meets all these criteria and qualifies as a parametric equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

Both the ISO7842DWW and ISO7842FDWW maintain Active product status from Texas Instruments, ensuring long-term availability and manufacturing support. Both components carry identical ROHS3 compliance certification and REACH unaffected designation, meeting current regulatory requirements for industrial and commercial applications.

Selection between these parts should be based on inventory availability and supply chain considerations. The ISO7842FDWW currently maintains significantly higher inventory levels (89,188 pieces) compared to the ISO7842DWW (761 pieces), making it the preferred choice for volume production and extended lead-time mitigation.

Both parts are qualified for identical electrical and thermal operating conditions, with no performance trade-offs between the two options. PCB layout, schematic integration, and thermal management strategies remain unchanged when substituting between these components.

Frequently Asked Questions (FAQ)

Q: Can ISO7842FDWW be used as a direct replacement for ISO7842DWW in existing designs?

A: Yes. The ISO7842FDWW is a parametric equivalent with identical electrical specifications, isolation voltage, channel configuration, data rate, propagation delay, supply voltage range, operating temperature, and package form factor. No circuit modifications are required.

Q: Are there any differences in pin configuration or PCB footprint between these parts?

A: No. Both components use the 16-SOIC (0.551", 14.00mm Width) package with identical pin assignments and footprint requirements. PCB layouts designed for ISO7842DWW are directly compatible with ISO7842FDWW.

Q: Do both parts meet the same compliance and regulatory standards?

A: Yes. Both ISO7842DWW and ISO7842FDWW carry ROHS3 compliance and REACH unaffected designation. Moisture sensitivity level is identical at MSL 2 (1 Year) for both parts.

Q: What is the primary reason to consider substitution?

A: Supply chain availability. The ISO7842FDWW maintains substantially higher inventory levels, reducing procurement lead times and supporting volume production schedules more effectively than the ISO7842DWW.

Q: Are the thermal and electrical performance characteristics identical?

A: Yes. Operating temperature range (-55°C ~ 125°C), supply voltage range (2.25V ~ 5.5V), propagation delay (16ns maximum), common mode transient immunity (100kV/µs), and all other electrical parameters are identical between both parts.