TL1431CPWR Equivalent & Substitute Parts

Part Overview

The TL1431CPWR is a shunt voltage reference IC manufactured by Texas Instruments, designed for adjustable voltage regulation applications. This component provides a fixed 2.5V output with adjustability up to 36V, delivering 100mA output current with ±0.4% tolerance. The part is classified as obsolete, making identification of suitable substitutes essential for ongoing design support and production continuity. The TL1431 series maintains consistent electrical performance across package variants, enabling direct functional replacement where mechanical constraints permit.

Substiute Parts

TL1431CPWR

Texas InstrumentsIn Stock: 2913TL1431CPWR Datasheet

Current PartRFQ

TL1431CDR

Texas InstrumentsIn Stock: 35270TL1431CDR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL1431CPWR is determined by electrical parameter equivalence within the TL1431 base product family. The primary substitution criterion is functional compatibility: all substitute parts must maintain identical electrical specifications including reference type (shunt), output type (adjustable), voltage range (2.5V to 36V), output current (100mA), and tolerance (±0.4%). The secondary criterion is mechanical compatibility, specifically the package type and mounting footprint. The TL1431CPWR uses an 8-TSSOP package (0.173", 4.40mm width), while substitute parts may use alternative surface-mount packages provided they maintain the same pin configuration and electrical interface. Product status and compliance certifications (RoHS3, MSL Level 1) are maintained across the TL1431 family, ensuring regulatory continuity.

Parameter Comparison

Engineering Selection Recommendations

The TL1431CDR serves as the primary substitute for the obsolete TL1431CPWR. Both components are manufactured by Texas Instruments and share identical electrical specifications across all critical parameters: shunt reference type, adjustable output topology, 2.5V to 36V voltage range, 100mA output current, and ±0.4% tolerance. Both parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring regulatory and environmental compatibility.

The key distinction between these parts is packaging: the TL1431CPWR uses an 8-TSSOP package while the TL1431CDR uses an 8-SOIC package. Both are surface-mount packages with identical pin counts and electrical interfaces. The 8-SOIC package (0.154", 3.90mm width) is slightly narrower than the 8-TSSOP package (0.173", 4.40mm width). PCB layout modifications may be required to accommodate the different package footprint.

The TL1431CDR is currently in active production status with significantly higher inventory availability (35,200 pieces) compared to the obsolete TL1431CPWR (2,808 pieces), making it the recommended long-term solution for new designs and production continuity.

Frequently Asked Questions (FAQ)

Q: Can the TL1431CDR directly replace the TL1431CPWR without circuit modifications?

A: The TL1431CDR provides identical electrical functionality and pin configuration. However, the different package footprint (8-SOIC versus 8-TSSOP) requires PCB layout changes. The circuit schematic remains unchanged.

Q: What is the difference between 8-TSSOP and 8-SOIC packages?

A: Both are 8-pin surface-mount packages with the same pin count and electrical interface. The 8-SOIC package is 0.154" wide (3.90mm), while the 8-TSSOP package is 0.173" wide (4.40mm). The footprint dimensions differ, requiring PCB redesign for physical compatibility.

Q: Are there any electrical performance differences between TL1431CPWR and TL1431CDR?

A: No. Both parts maintain identical electrical specifications: 2.5V to 36V adjustable output, 100mA output current, ±0.4% tolerance, 1mA cathode current, and 0°C to 70°C operating temperature range.

Q: Why is the TL1431CPWR marked as obsolete?

A: The TL1431CPWR has been discontinued by Texas Instruments. The TL1431CDR remains in active production and is the recommended substitute for ongoing applications.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the TL1431CPWR and TL1431CDR are ROHS3 compliant with MSL Level 1 rating, ensuring equivalent regulatory and environmental compliance.

Q: What inventory considerations should be evaluated?

A: The TL1431CPWR has limited remaining inventory (2,808 pieces). The TL1431CDR has substantially higher availability (35,200 pieces) and is in active production, making it suitable for long-term supply chain planning.