TLV431BCLPR Equivalent & Substitute Parts

Part Overview

The TLV431BCLPR is a shunt voltage reference IC manufactured by Texas Instruments, designed for adjustable voltage regulation applications. This through-hole TO-92-3 packaged component provides a fixed 1.24V output with ±0.5% tolerance and 15 mA output current capability. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain flexibility for new production runs or design revisions.

Substiute Parts

TLV431BCLPR

Texas InstrumentsIn Stock: 2462TLV431BCLPR Datasheet

Current PartRFQ

TLV431BIDBZR

Texas InstrumentsIn Stock: 39225TLV431BIDBZR 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 TLV431BCLPR is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Reference Type: Shunt (all substitutes must maintain shunt topology)
• Output Type: Adjustable (functional equivalence)
• Voltage - Output (Min/Fixed): 1.24V (core reference voltage)
• Voltage - Output (Max): 6V (maximum output range)
• Tolerance: ±0.5% or better (precision requirement)
• Current - Output: Minimum 15 mA (functional capacity)
• Current - Cathode: 100 µA or lower (bias current compatibility)

Mechanical Compatibility Requirements:

• Mounting Type: Through Hole (PCB assembly method)
• Package / Case: TO-92-3 (physical form factor)

Compliance Requirements:

• RoHS3 Compliant (regulatory requirement)

Substitutes are grouped into two categories:

Category 1 - Direct Electrical & Mechanical Equivalents (Same Package, Same Tolerance):

• TLV431BIDBZR: Surface mount alternative (SOT-23-3 package, different mounting type)

Category 2 - Electrical Equivalents with Enhanced Specifications (Same Package, Relaxed Tolerance):

• TS431AIZ-AP, TS431AIZT, TS431IZ-AP, TS431IZT: STMicroelectronics alternatives with ±1% to ±2% tolerance, higher output current (30 mA), and extended temperature range

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole PCB Assemblies (Recommended Primary Substitutes):

TS431AIZT and TS431AIZ-AP are the preferred substitutes for through-hole applications. Both parts maintain the TO-92-3 package form factor and provide enhanced specifications including higher output current (30 mA versus 15 mA), extended operating temperature range (-40°C to 125°C versus 0°C to 70°C), and lower cathode current (60 µA versus 100 µA). The ±1% tolerance specification remains within acceptable precision margins for most adjustable voltage reference applications. Both parts are in Active product status with substantial inventory availability.

TS431IZT and TS431IZ-AP offer identical electrical and mechanical characteristics to the TS431AI variants with relaxed ±2% tolerance specification. These parts are suitable for applications where tolerance requirements are less stringent.

For Surface-Mount PCB Assemblies (Alternative for Design Revision):

TLV431BIDBZR provides direct electrical equivalence with ±0.5% tolerance matching the original TLV431BCLPR specification. This part requires PCB redesign to accommodate SOT-23-3 surface-mount packaging. The extended operating temperature range (-40°C to 85°C) and Active product status support long-term supply continuity.

Compliance Verification:

All substitute parts maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can TS431 series parts directly replace TLV431BCLPR in existing designs?

A: TS431 series parts are electrically compatible substitutes for through-hole applications. The TO-92-3 package pinout is identical, allowing direct PCB mounting without layout modifications. However, verify that the relaxed tolerance specifications (±1% or ±2% versus ±0.5%) meet your circuit precision requirements before implementation.

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

A: Both parts are electrically identical with ±1% tolerance, 30 mA output current, and TO-92-3 packaging. The primary difference is packaging format: TS431AIZ-AP is supplied in Tape & Box format, while TS431AIZT is supplied in Tape & Reel format. Select based on your procurement and assembly requirements.

Q: Why does TLV431BIDBZR have a different package than the original part?

A: TLV431BIDBZR uses SOT-23-3 surface-mount packaging instead of through-hole TO-92-3. This substitution requires PCB redesign and is recommended only for new product development or design revisions where surface-mount assembly is preferred.

Q: Are the STMicroelectronics TS431 parts suitable for applications requiring ±0.5% tolerance?

A: TS431AIZ-AP and TS431AIZT provide ±1% tolerance, which is less precise than the original ±0.5% specification. TS431IZ-AP and TS431IZT provide ±2% tolerance. Evaluate your circuit's tolerance budget to determine acceptability. For applications requiring ±0.5% precision, TLV431BIDBZR maintains the original tolerance specification.

Q: What is the operating temperature range difference, and does it matter?

A: The original TLV431BCLPR operates from 0°C to 70°C. All substitute parts extend this range to -40°C to 125°C (TS431 series) or -40°C to 85°C (TLV431BIDBZR). Extended temperature range provides design margin for industrial and automotive applications but does not negatively impact standard commercial temperature range designs.

Q: Which substitute part has the best inventory availability?

A: TS431AIZT has the highest inventory level at 55,200 pieces. TLV431BIDBZR follows with 39,200 pieces. Both parts support immediate procurement for production requirements.