TLV431ACLPR Equivalent & Substitute Parts

Part Overview

The TLV431ACLPR 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 ±1% 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

TLV431ACLPR

Texas InstrumentsIn Stock: 1006TLV431ACLPR Datasheet

Current PartRFQ

TLV431AIDBZR

Texas InstrumentsIn Stock: 68481TLV431AIDBZR 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 of the TLV431ACLPR 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): 6 V (maximum output range)
• Tolerance: ±1% or better (precision requirement)
• Current - Output: Minimum 15 mA (functional requirement)

Mechanical Compatibility Requirements:

• Mounting Type: Through Hole (PCB assembly compatibility)
• Package / Case: TO-92-3 or equivalent surface mount alternatives (physical footprint)

Compliance Requirements:

• RoHS Status: ROHS3 Compliant (regulatory requirement)

Substitutes are grouped into two categories:

Category 1 - Direct Through-Hole Replacements (Same Mounting Type): Parts maintaining TO-92-3 through-hole packaging with identical or superior electrical specifications. These include TS431AIZ-AP, TS431AIZT, TS431IZ-AP, and TS431IZT from STMicroelectronics.

Category 2 - Surface Mount Alternative (Different Mounting Type): The TLV431AIDBZR provides electrical equivalence in SOT-23-3 surface mount packaging. This substitute requires PCB redesign but offers superior product status (Active vs. Last Time Buy) and extended temperature range.

Parameter Comparison

Engineering Selection Recommendations

For Direct Through-Hole Replacement (No PCB Redesign):

TS431AIZT and TS431AIZ-AP are the preferred through-hole substitutes. Both maintain TO-92-3 packaging and deliver superior electrical performance with 30 mA output current (double the original specification) and ±1% tolerance matching. These parts are manufactured by STMicroelectronics and carry Active product status, ensuring long-term availability. Operating temperature range extends to -40°C ~ 125°C, providing broader environmental coverage than the original part.

TS431IZT and TS431IZ-AP are functionally equivalent alternatives with identical packaging and mounting type. These parts feature ±2% tolerance, which remains within acceptable precision for most adjustable reference applications. Both maintain 30 mA output current and Active product status.

For Surface Mount Migration (PCB Redesign Required):

TLV431AIDBZR offers electrical equivalence in SOT-23-3 surface mount packaging. This substitute is manufactured by Texas Instruments and maintains ±1% tolerance with 15 mA output current matching the original specification. Product status is Active, ensuring continued supply. This option is suitable for new designs or board revisions where surface mount assembly is preferred.

Compliance Verification:

All substitute parts maintain ROHS3 compliance and REACH Unaffected status, meeting regulatory requirements equivalent to the original TLV431ACLPR.

Frequently Asked Questions (FAQ)

Q: Can TS431 series parts directly replace TLV431ACLPR in existing designs?

A: Yes, for through-hole applications. TS431AIZ-AP and TS431AIZT maintain identical TO-92-3 packaging and pinout compatibility. The increased output current (30 mA vs. 15 mA) and extended temperature range provide superior performance without circuit modification.

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

A: Both parts are electrically identical with ±1% tolerance, 30 mA output current, and -40°C ~ 125°C operating range. The primary difference is packaging format: TS431AIZ-AP is supplied in Tape & Box (TB) configuration, while TS431AIZT is supplied in Tape & Reel (TR) configuration. Selection depends on procurement volume and assembly line requirements.

Q: Why do TS431IZ-AP and TS431IZT have ±2% tolerance instead of ±1%?

A: These parts represent a lower-precision variant within the TS431 family. The ±2% tolerance remains suitable for adjustable reference applications where the original ±1% specification provides margin beyond functional requirements. These parts are valid substitutes if tolerance relaxation is acceptable in the application.

Q: Is TLV431AIDBZR a suitable replacement for through-hole designs?

A: TLV431AIDBZR requires PCB redesign due to SOT-23-3 surface mount packaging versus TO-92-3 through-hole. This substitute is appropriate for new designs or board revisions targeting surface mount assembly. Electrical specifications match the original part with ±1% tolerance and 15 mA output current.

Q: What is the significance of "Last Time Buy" status for TLV431ACLPR?

A: Last Time Buy indicates the manufacturer has discontinued production and will not accept new orders beyond a specified cutoff date. Existing inventory may be available, but long-term supply is not guaranteed. Transition to an Active product status substitute (TS431 series or TLV431AIDBZR) is recommended for designs requiring extended production runs.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitutes maintain ROHS3 compliance and REACH Unaffected status, meeting regulatory requirements equivalent to the original TLV431ACLPR.