ISO7731FBDWR Equivalent & Substitute Parts

Part Overview

The ISO7731FBDWR is a general purpose digital isolator manufactured by Texas Instruments, featuring 5000Vrms isolation voltage across 3 channels with 100Mbps data rate capability. This device utilizes capacitive coupling technology and operates across a supply voltage range of 2.25V to 5.5V with an operating temperature range of -55°C to 125°C. The part is housed in a 16-SOIC (0.295", 7.50mm Width) surface mount package and is supplied in Tape & Reel (TR) packaging format. The ISO7731FBDWR maintains Active product status and is ROHS3 compliant. Substitute parts are necessary when the Tape & Reel packaging format is unavailable or when alternative packaging configurations better suit procurement requirements or inventory management strategies.

Substiute Parts

ISO7731FBDWR

Texas InstrumentsIn Stock: 739ISO7731FBDWR Datasheet

Current PartRFQ

ISO7731BDWR

Texas InstrumentsIn Stock: 6389ISO7731BDWR Datasheet

Parametric EquivalentRFQ

ISO7731DWR

Texas InstrumentsIn Stock: 17321ISO7731DWR Datasheet

Parametric EquivalentRFQ

ISO7731FDWR

Texas InstrumentsIn Stock: 5474ISO7731FDWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

All substitute parts listed for the ISO7731FBDWR share identical electrical and mechanical specifications with the main part. Substitution is determined by the following key parameters that remain constant across all variants:

• Base product number: ISO7731
• Isolation voltage: 5000Vrms
• Number of channels: 3
• Channel configuration: 2 inputs on Side 1, 1 input on Side 2 (unidirectional)
• Data rate: 100Mbps
• Common mode transient immunity: 85kV/µs minimum
• Supply voltage range: 2.25V to 5.5V
• Operating temperature range: -55°C to 125°C
• Package type: 16-SOIC (0.295", 7.50mm Width)
• Mounting type: Surface Mount
• Technology: Capacitive Coupling
• Compliance: ROHS3 Compliant, REACH Unaffected

The primary distinction between the main part and substitute parts lies in packaging format. The ISO7731FBDWR is supplied in Tape & Reel (TR) format, while substitute parts are available in Cut Tape (CT) & Digi-Reel® format. All parts maintain identical electrical performance characteristics, propagation delay specifications (16ns maximum for both tpLH and tpHL), pulse width distortion (4.9ns maximum), and rise/fall times (1.3ns and 1.4ns typical).

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain full electrical and functional equivalence to the ISO7731FBDWR. Selection between the main part and substitute variants should be based on packaging format requirements and inventory availability.

ISO7731FBDWR (Tape & Reel format) is suitable for high-volume automated assembly operations where continuous reel feeding is required. This packaging format is optimized for pick-and-place equipment integration.

ISO7731BDWR, ISO7731DWR, and ISO7731FDWR (Cut Tape & Digi-Reel® format) are suitable for mixed-volume production runs, prototyping, and applications where flexible packaging is advantageous. These variants provide equivalent performance with alternative supply configurations.

All parts are Active products with ROHS3 compliance and REACH Unaffected status, confirming regulatory alignment for current and future applications. The identical electrical specifications across all variants ensure direct substitution without circuit redesign or performance degradation.

Frequently Asked Questions (FAQ)

Q: Can ISO7731BDWR, ISO7731DWR, or ISO7731FDWR be used as direct replacements for ISO7731FBDWR in existing designs?

A: Yes. All substitute parts share identical electrical specifications, including isolation voltage (5000Vrms), data rate (100Mbps), common mode transient immunity (85kV/µs), supply voltage range (2.25V to 5.5V), and operating temperature range (-55°C to 125°C). The only difference is packaging format. PCB footprints and circuit connections remain unchanged.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging?

A: Tape & Reel (TR) packaging supplies components on continuous reels suitable for automated high-speed assembly lines. Cut Tape (CT) & Digi-Reel® packaging provides components in cut tape format with optional Digi-Reel® carrier, offering flexibility for lower-volume production, prototyping, and manual assembly processes.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. ISO7731FBDWR, ISO7731BDWR, ISO7731DWR, and ISO7731FDWR are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Do the substitute parts have identical propagation delay and timing characteristics?

A: Yes. All parts maintain identical maximum propagation delay specifications (16ns for both tpLH and tpHL), pulse width distortion (4.9ns maximum), and typical rise/fall times (1.3ns and 1.4ns respectively).

Q: What is the Moisture Sensitivity Level (MSL) for all variants?

A: All variants have MSL rating of 2 with a 1-year shelf life, indicating identical moisture handling requirements and storage conditions.

Q: Can these parts be used interchangeably in the same assembly?

A: Yes, from an electrical and functional perspective. However, assembly line integration may differ based on packaging format. Tape & Reel format integrates with continuous reel feeders, while Cut Tape & Digi-Reel® format accommodates alternative feeding mechanisms.