ISO7831DW Digital Isolator - Equivalent & Substitute Parts

Part Overview

The ISO7831DW is a general purpose digital isolator manufactured by Texas Instruments, featuring 5700Vrms 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 component is actively produced and ROHS3 compliant, making it suitable for industrial and commercial isolation applications requiring high common mode transient immunity of 70kV/µs.

Identifying equivalent and substitute parts is necessary when addressing supply chain constraints, inventory availability, or specific packaging requirements while maintaining identical electrical and mechanical performance characteristics.

Substiute Parts

ISO7831DW

Texas InstrumentsIn Stock: 3142ISO7831DW Datasheet

Current PartRFQ

ISO7831FDW

Texas InstrumentsIn Stock: 100480ISO7831FDW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ISO7831DW is determined by strict equivalence across the following critical parameters:

• Isolation voltage rating (5700Vrms)
• Channel configuration (3 channels, 2/1 input/output distribution)
• Data rate capability (100Mbps minimum)
• Common mode transient immunity (70kV/µs minimum)
• Package type (16-SOIC with 0.295" width, 7.50mm)
• Supply voltage range (2.25V ~ 5.5V)
• Operating temperature range (-55°C ~ 125°C)
• Technology platform (Capacitive Coupling)

The ISO7831FDW qualifies as a parametric equivalent based on identical electrical specifications and mechanical packaging. The distinction between these parts lies in packaging format (tape and reel versus bulk) and inventory availability, not in functional or electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both the ISO7831DW and ISO7831FDW are active products from Texas Instruments with identical electrical and mechanical specifications. Selection between these parts should be based on packaging and supply requirements:

The ISO7831DW is supplied in tape and reel packaging format, suitable for automated assembly processes and production environments requiring standard component reels.

The ISO7831FDW is supplied in bulk packaging format, with significantly higher inventory availability (100,400 pieces versus 3,050 pieces). This variant is appropriate for applications where packaging format flexibility exists or where bulk quantities are preferred.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across industrial and commercial applications. Moisture sensitivity level remains consistent at MSL 2 (1 Year) for both variants.

Frequently Asked Questions (FAQ)

Q: Can ISO7831FDW replace ISO7831DW in production assemblies?

A: Yes. Both parts are electrically and mechanically identical. The only difference is packaging format (tape and reel versus bulk). Automated pick-and-place equipment can accommodate both formats with appropriate feeder configuration.

Q: Are there any performance differences between ISO7831DW and ISO7831FDW?

A: No. All electrical parameters, timing specifications, isolation ratings, and operating characteristics are identical. Both parts use the same capacitive coupling technology and meet the same performance standards.

Q: What determines whether a part qualifies as a substitute for the ISO7831DW?

A: A substitute must match all critical parameters: 5700Vrms isolation voltage, 3-channel configuration with 2/1 input/output distribution, 100Mbps data rate, 70kV/µs CMTI, 16-SOIC package, 2.25V to 5.5V supply range, -55°C to 125°C operating temperature, and capacitive coupling technology.

Q: Does packaging format affect component reliability or lifespan?

A: No. Packaging format (tape and reel versus bulk) does not affect component reliability, performance, or lifespan. Both formats provide equivalent moisture protection and handling characteristics at MSL 2 (1 Year).

Q: Are both parts suitable for high-reliability applications?

A: Both ISO7831DW and ISO7831FDW are active products with ROHS3 compliance and REACH unaffected status. Selection for high-reliability applications should be based on specific application requirements and qualification procedures, not on packaging format differences.