TLV431ILPR Equivalent & Substitute Parts

Part Overview

The TLV431ILPR is a shunt voltage reference IC manufactured by Texas Instruments, designed for adjustable voltage regulation applications. This device provides a fixed minimum output of 1.24V with adjustable maximum output up to 6V, delivering 15mA output current with ±1.5% tolerance. The part is packaged in TO-92-3 (through-hole) configuration and operates across the industrial temperature range of -40°C to 85°C.

The TLV431ILPR is currently in Last Time Buy status, indicating discontinued production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for existing applications.

Substiute Parts

TLV431ILPR

Texas InstrumentsIn Stock: 3661TLV431ILPR Datasheet

Current PartRFQ

TLV431IDBZR

Texas InstrumentsIn Stock: 21506TLV431IDBZR Datasheet

MFR RecommendedRFQ

TS431AIZ-AP

STMicroelectronicsIn Stock: 1122TS431AIZ-AP Datasheet

MFR RecommendedRFQ

TS431AIZT

STMicroelectronicsIn Stock: 55282TS431AIZT Datasheet

MFR RecommendedRFQ

TS431IZ-AP

STMicroelectronicsIn Stock: 907TS431IZ-AP Datasheet

MFR RecommendedRFQ

TS431IZT

STMicroelectronicsIn Stock: 5126TS431IZT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLV431ILPR is determined by the following critical parameters:

Core Electrical Parameters (Must Match or Exceed):

• Reference Type: Shunt
• Output Type: Adjustable
• Voltage Output Range: 1.24V minimum to 6V maximum
• Output Current: Minimum 15mA
• Tolerance: ±1.5% or better
• Operating Temperature: Minimum -40°C to 85°C range

Package Compatibility:

• TO-92-3 through-hole configuration required for direct pin-compatible substitution
• SOT-23-3 surface-mount variants available for redesign scenarios

Compliance Requirements:

• ROHS3 compliance mandatory
• REACH unaffected status required

The substitute parts are grouped into two categories:

Group 1 - Direct Pin-Compatible Substitutes (TO-92-3 Package):

• TS431AIZ-AP (STMicroelectronics)
• TS431AIZT (STMicroelectronics)
• TS431IZ-AP (STMicroelectronics)
• TS431IZT (STMicroelectronics)

These parts maintain identical TO-92-3 packaging and meet or exceed the electrical specifications of the TLV431ILPR.

Group 2 - Functional Equivalent (Surface Mount):

• TLV431IDBZR (Texas Instruments)

This part provides identical electrical performance but requires PCB redesign due to SOT-23-3 surface-mount packaging.

Parameter Comparison

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (No PCB Redesign):

Select from the STMicroelectronics TS431 series (TS431AIZ-AP, TS431AIZT, TS431IZ-AP, or TS431IZT) when maintaining existing through-hole TO-92-3 PCB layouts. All four variants provide identical electrical performance with enhanced specifications:

• Output current capability increased to 30mA (double the TLV431ILPR)
• Extended operating temperature range to -40°C to 125°C
• Lower cathode current requirement (60µA vs. 80µA)
• Active product status with established supply chains

The TS431AIZ-AP and TS431AIZT variants offer superior tolerance (±1%) compared to the original ±1.5%, while TS431IZ-AP and TS431IZT maintain ±2% tolerance. All variants meet ROHS3 compliance and REACH unaffected requirements.

For Surface-Mount Redesign:

The TLV431IDBZR (Texas Instruments) provides identical electrical specifications to the original TLV431ILPR in SOT-23-3 surface-mount packaging. This option maintains the original manufacturer and ±1.5% tolerance specification while enabling modern PCB assembly processes. Active product status ensures long-term availability.

Compliance Verification:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the original TLV431ILPR.

Frequently Asked Questions (FAQ)

Q: Can I directly replace TLV431ILPR with TS431 series parts without PCB modification?

A: Yes. The TS431AIZ-AP, TS431AIZT, TS431IZ-AP, and TS431IZT all use identical TO-92-3 through-hole packaging with pin-compatible configurations. No PCB layout changes are required. The primary differences are enhanced electrical performance (higher output current, extended temperature range) and improved tolerance specifications.

Q: What is the difference between TS431AIZ-AP, TS431AIZT, TS431IZ-AP, and TS431IZT?

A: These four variants differ in packaging format and tolerance specification. TS431AIZ-AP and TS431AIZT offer ±1% tolerance (superior precision), while TS431IZ-AP and TS431IZT provide ±2% tolerance. The suffix indicates packaging: "-AP" denotes Tape & Box format, while "T" denotes Tape & Reel format. Electrical performance and pin configuration remain identical across all four variants.

Q: Why does the TLV431IDBZR have a different package type?

A: The TLV431IDBZR is the surface-mount equivalent of the TLV431ILPR, using SOT-23-3 packaging instead of TO-92-3. This variant is suitable for modern PCB assembly processes but requires PCB redesign. Electrical specifications remain identical to the original part.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (TLV431IDBZR, TS431AIZ-AP, TS431AIZT, TS431IZ-AP, and TS431IZT) are ROHS3 compliant and REACH unaffected, meeting regulatory requirements equivalent to the original TLV431ILPR.

Q: What is the advantage of the TS431 series over the original TLV431ILPR?

A: The TS431 series provides enhanced specifications: output current doubled to 30mA, operating temperature range extended to -40°C to 125°C (versus -40°C to 85°C), and lower cathode current requirement (60µA versus 80µA). These improvements provide greater design margin and extended operational capability while maintaining pin compatibility.

Q: Can I use TS431 parts in applications requiring the exact ±1.5% tolerance of the TLV431ILPR?

A: The TS431AIZ-AP and TS431AIZT variants offer ±1% tolerance, which exceeds the ±1.5% requirement and provides superior precision. The TS431IZ-AP and TS431IZT variants provide ±2% tolerance, which is within acceptable tolerance for most applications but represents a slight relaxation from the original specification. Verify tolerance requirements for your specific application.

Q: What is the current inventory status of substitute parts?

A: TLV431IDBZR has 21,400 units in stock. TS431AIZT has 55,200 units in stock. TS431IZT has 5,071 units in stock. TS431AIZ-AP has 1,024 units in stock. TS431IZ-AP has 853 units in stock. All substitute parts are actively produced and readily available.