ISO7731BDWR Equivalent & Substitute Parts

Part Overview

The ISO7731BDWR is a general purpose digital isolator manufactured by Texas Instruments, featuring 5000Vrms isolation voltage, 3 channels, and 100Mbps data rate in a 16-SOIC surface mount package. This device is classified as Active product status and utilizes capacitive coupling technology for signal isolation in industrial and consumer applications.

Substitute parts become necessary when the primary part number experiences extended lead times, inventory constraints, or when design flexibility permits selection from equivalent alternatives within the same product family. The ISO7731 series provides multiple packaging and configuration options that maintain electrical and mechanical compatibility.

Substiute Parts

ISO7731BDWR

Texas InstrumentsIn Stock: 6389ISO7731BDWR Datasheet

Current PartRFQ

ISO7731DWR

Texas InstrumentsIn Stock: 17321ISO7731DWR Datasheet

Parametric EquivalentRFQ

ISO7731FDWR

Texas InstrumentsIn Stock: 5474ISO7731FDWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISO7731BDWR is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute parts ISO7731DWR and ISO7731FDWR are classified as parametric equivalents because they maintain identical specifications in the following key areas:

Electrical Parameters (Must Match):

• Isolation voltage: 5000Vrms
• Channel count: 3 channels
• Data rate: 100Mbps
• Common mode transient immunity: 85kV/µs minimum
• Propagation delay: 16ns maximum (both rising and falling edges)
• Pulse width distortion: 4.9ns maximum
• Supply voltage range: 2.25V ~ 5.5V
• Operating temperature: -55°C ~ 125°C

Mechanical Parameters (Must Match):

• Package: 16-SOIC (0.295", 7.50mm Width)
• Mounting type: Surface Mount
• Pin configuration: Unidirectional, 2/1 input/output arrangement

Compliance & Certification (Must Match):

• RoHS3 Compliant
• Moisture Sensitivity Level: 2 (1 Year)
• REACH Status: REACH Unaffected
• Technology: Capacitive Coupling

All three part numbers share the same base product number ISO7731 and are manufactured by Texas Instruments with Active product status, confirming long-term availability and support.

Parameter Comparison

Engineering Selection Recommendations

All three part numbers—ISO7731BDWR, ISO7731DWR, and ISO7731FDWR—are direct parametric equivalents suitable for interchangeable use in applications requiring 5000Vrms digital isolation with 3-channel, 100Mbps capability in a 16-SOIC package.

Selection Basis:

The choice between these parts is determined by inventory availability and supply chain considerations rather than electrical or mechanical differences. All parts maintain Active product status from Texas Instruments, ensuring continued manufacturing support and compliance with RoHS3 and REACH regulations.

ISO7731DWR currently maintains the highest inventory level at 17,300 pieces, followed by ISO7731BDWR at 6,300 pieces, and ISO7731FDWR at 5,366 pieces. This inventory distribution may influence procurement decisions when lead time optimization is required.

All three parts are supplied in Cut Tape (CT) and Digi-Reel® packaging formats, maintaining identical handling and storage requirements with Moisture Sensitivity Level 2 (1 Year).

Frequently Asked Questions (FAQ)

Q: Can ISO7731DWR and ISO7731FDWR be used as direct replacements for ISO7731BDWR?

A: Yes. All three part numbers are parametric equivalents with identical electrical specifications, channel configuration, isolation voltage, data rate, timing characteristics, supply voltage range, operating temperature range, and package dimensions. Direct substitution is supported without circuit modification.

Q: Are there any differences in the pin configuration between these three parts?

A: No. All three parts feature identical 16-SOIC package geometry (0.295", 7.50mm Width) with the same unidirectional channel arrangement (2 inputs on Side 1, 1 output on Side 2). Pin-for-pin compatibility is confirmed.

Q: Do all three parts meet the same compliance standards?

A: Yes. ISO7731BDWR, ISO7731DWR, and ISO7731FDWR are all RoHS3 Compliant, REACH Unaffected, and carry identical Moisture Sensitivity Level 2 (1 Year) ratings. Compliance certifications are equivalent across all three part numbers.

Q: What is the difference between these part numbers if they are electrically identical?

A: The part number suffixes (B, blank, F) indicate internal manufacturing or qualification variations within the Texas Instruments product line. These variations do not affect electrical performance, timing characteristics, or functional behavior. All parts are manufactured to the same specification and are functionally interchangeable.

Q: Can these parts be mixed in the same production batch or assembly?

A: Yes. Since all three parts are parametric equivalents with identical electrical and mechanical specifications, they can be used interchangeably within the same design and assembly process without requiring design changes, re-qualification, or circuit board modifications.

Q: What is the isolation voltage rating, and is it consistent across all three parts?

A: All three parts provide 5000Vrms isolation voltage with 85kV/µs common mode transient immunity. This specification is identical across ISO7731BDWR, ISO7731DWR, and ISO7731FDWR.

Q: Are there any temperature or supply voltage differences between these parts?

A: No. All three parts operate across the identical temperature range of -55°C to 125°C and support the same supply voltage range of 2.25V to 5.5V. Operating conditions are fully equivalent.

Q: What packaging options are available for these parts?

A: All three part numbers are supplied in Cut Tape (CT) and Digi-Reel® packaging formats. No alternative package types are available for these specific part numbers.