ISO7231CDW Equivalent & Substitute Parts

Part Overview

The ISO7231CDW is a general purpose digital isolator manufactured by Texas Instruments, featuring 2500Vrms isolation voltage and 3-channel unidirectional configuration. This device utilizes capacitive coupling technology and operates across a supply voltage range of 3.15V to 5.5V with a maximum data rate of 25Mbps. The ISO7231CDW is currently in Last Time Buy status, indicating end-of-life phase. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain component availability for new production runs and long-term system support.

Substiute Parts

ISO7231CDW

Texas InstrumentsIn Stock: 1312ISO7231CDW Datasheet

Current PartRFQ

ISO7231CDWR

Texas InstrumentsIn Stock: 20196ISO7231CDWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISO7231CDW is determined by strict equivalence across the following critical parameters: identical base product number (ISO7231), matching package type (16-SOIC), identical isolation voltage rating (2500Vrms), matching channel configuration (3 channels, unidirectional), equivalent data rate (25Mbps), and compatible supply voltage range (3.15V ~ 5.5V). The ISO7231CDWR qualifies as a direct substitute because it maintains all these core electrical and mechanical specifications while differing only in packaging format (Cut Tape & Digi-Reel versus Tube) and product status (Active versus Last Time Buy).

Parameter Comparison

Engineering Selection Recommendations

The ISO7231CDWR is the direct substitute for the ISO7231CDW. Both parts maintain identical electrical performance specifications and physical package dimensions. The primary distinction is product lifecycle status: the ISO7231CDW is in Last Time Buy phase, while the ISO7231CDWR is Active. For new designs and ongoing production, the ISO7231CDWR is the appropriate selection due to its active status and assured long-term availability. Both parts carry ROHS3 compliance and REACH Unaffected certification, meeting current regulatory requirements. The packaging format difference (Tube versus Cut Tape & Digi-Reel) does not affect functional compatibility and represents a supply chain consideration rather than a technical constraint.

Frequently Asked Questions (FAQ)

Q: Can ISO7231CDWR be used as a direct replacement for ISO7231CDW in existing designs? A: Yes. The ISO7231CDWR is electrically and mechanically identical to the ISO7231CDW. All functional parameters, including isolation voltage, data rate, propagation delay, and supply voltage specifications, are equivalent. The parts are pin-compatible and require no circuit modifications.

Q: What is the difference between the Tube and Cut Tape packaging formats? A: Tube packaging (ISO7231CDW) is typically used for lower-volume orders and manual assembly processes. Cut Tape & Digi-Reel packaging (ISO7231CDWR) is optimized for automated pick-and-place assembly and higher-volume production. Both formats contain identical die and lead frames; the difference is purely in the delivery and handling method.

Q: Why is the ISO7231CDW in Last Time Buy status? A: Last Time Buy status indicates that Texas Instruments is discontinuing this specific packaging variant. The ISO7231CDWR, with its Active status, represents the ongoing production variant. Customers should transition to the ISO7231CDWR for new designs and future production runs.

Q: Are there any compliance or certification differences between these parts? A: No. Both the ISO7231CDW and ISO7231CDWR carry identical certifications: ROHS3 Compliant, REACH Unaffected, and equivalent Moisture Sensitivity Level (MSL 2, 1 Year). They meet the same regulatory and environmental standards.

Q: What is the minimum isolation voltage rating, and does it apply to both parts? A: Both parts provide 2500Vrms isolation voltage with a Common Mode Transient Immunity of 25kV/µs. This specification is identical across both variants and determines their suitability for high-voltage isolation applications.

Q: Can these parts be used interchangeably in automated assembly? A: Yes, with supply chain coordination. The ISO7231CDWR is specifically packaged for automated assembly (Cut Tape & Digi-Reel format), while the ISO7231CDW uses Tube packaging. If your assembly process is configured for one format, ensure supply continuity by sourcing the matching packaging variant.