TLV431AILPR Equivalent & Substitute Parts

Part Overview

The TLV431AILPR 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 supports output currents up to 15 mA. The part is currently in Last Time Buy status, indicating production discontinuation. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring shunt voltage reference functionality.

Substiute Parts

TLV431AILPR

Texas InstrumentsIn Stock: 16435TLV431AILPR 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 eligibility for the TLV431AILPR is determined by the following critical parameters:

Primary Substitution Criteria:

• Reference Type: Shunt
• Output Type: Adjustable
• Voltage - Output (Min/Fixed): 1.24V
• Voltage - Output (Max): 6 V
• Tolerance: ±1% (or tighter)
• Package / Case: TO-92-3 (through-hole form factor)
• RoHS Status: ROHS3 Compliant

Secondary Compatibility Factors:

• Current - Output: 15 mA minimum (higher values acceptable)
• Operating Temperature: -40°C ~ 85°C minimum range
• Current - Cathode: 80 µA reference

Substitute parts are grouped into two categories:

Group 1 - Direct Equivalents (Identical Specifications): Parts maintaining identical electrical specifications and through-hole TO-92-3 packaging with ±1% tolerance.

Group 2 - Enhanced Specifications (Acceptable Substitutes): Parts with superior or equivalent performance characteristics, including higher output current capability (30 mA), extended temperature range (-40°C ~ 125°C), and improved temperature coefficient (100ppm/°C), while maintaining core functional requirements and through-hole packaging.

Parameter Comparison

Engineering Selection Recommendations

For Direct Through-Hole Replacement (Identical Specifications):

TS431AIZ-AP and TS431AIZT are the primary through-hole substitutes maintaining ±1% tolerance and TO-92-3 packaging. Both parts are manufactured by STMicroelectronics and carry Active product status, ensuring long-term availability. These parts provide enhanced specifications including 30 mA output current (versus 15 mA), extended operating temperature range to 125°C, and documented temperature coefficient of 100ppm/°C. All parts maintain ROHS3 compliance and are suitable for direct pin-compatible replacement in through-hole applications.

For Surface Mount Applications:

TLV431AIDBZR provides an equivalent Texas Instruments solution in SOT-23-3 surface mount packaging. This part maintains identical electrical specifications (±1% tolerance, 15 mA output current) and Active product status. Surface mount conversion requires PCB redesign and is not a direct mechanical replacement for through-hole designs.

For Applications with Relaxed Tolerance Requirements:

TS431IZ-AP and TS431IZT offer ±2% tolerance specifications with identical voltage range and enhanced current capability (30 mA). These parts are suitable for applications where ±2% tolerance is acceptable, providing extended temperature range and improved thermal stability through documented temperature coefficient specifications.

Compliance and Availability:

All substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the original part's regulatory requirements. STMicroelectronics parts (TS431 series) demonstrate higher inventory levels and Active product status, supporting long-term design continuity compared to the Last Time Buy status of the original TLV431AILPR.

Frequently Asked Questions (FAQ)

Q: Can TS431AIZ-AP directly replace TLV431AILPR in existing designs?

A: Yes. TS431AIZ-AP is pin-compatible with identical TO-92-3 through-hole packaging. Both parts share the same 1.24V fixed output, 6V maximum output, and ±1% tolerance. The TS431AIZ-AP provides enhanced specifications including 30 mA output current (versus 15 mA) and extended temperature range (-40°C to 125°C versus -40°C to 85°C), making it functionally superior for the same application.

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

A: The primary difference is tolerance specification. TS431AIZ-AP maintains ±1% tolerance matching the original TLV431AILPR, while TS431IZ-AP specifies ±2% tolerance. Both parts share identical voltage range (1.24V to 6V), 30 mA output current, and TO-92-3 packaging. Selection depends on application tolerance requirements.

Q: Why is TLV431AIDBZR listed as a substitute if it uses different packaging?

A: TLV431AIDBZR is listed as a manufacturer-recommended equivalent for applications where surface mount technology is acceptable. It maintains identical electrical specifications (±1% tolerance, 1.24V to 6V output, 15 mA current) and is manufactured by Texas Instruments. This part requires PCB redesign and is not suitable for through-hole socket replacement.

Q: Are STMicroelectronics TS431 parts fully compatible with Texas Instruments TLV431 designs?

A: Yes, for through-hole applications. Both manufacturers' shunt voltage reference ICs share identical functional specifications, pin configuration, and TO-92-3 packaging. All parts maintain ROHS3 compliance and REACH Unaffected status. The TS431 series offers enhanced specifications (higher current, extended temperature range) while maintaining backward compatibility.

Q: What should I consider when selecting between TS431AIZT and TS431IZT?

A: Selection depends on tolerance requirements. TS431AIZT specifies ±1% tolerance, matching the original TLV431AILPR specification. TS431IZT specifies ±2% tolerance. Both parts are identical in all other parameters (voltage range, current, temperature range, packaging). Choose TS431AIZT for applications requiring ±1% accuracy; TS431IZT is suitable for applications with relaxed tolerance specifications.

Q: Is the extended temperature range of TS431 parts (-40°C to 125°C) a concern for TLV431AILPR replacement?

A: No. Extended temperature range represents improved capability and does not create compatibility issues. If the original design operates within -40°C to 85°C, the TS431 parts will function identically within that range. The extended range provides additional margin for thermal stress and environmental variations.

Q: Can I use TS431AIZT in tape and reel packaging for applications originally designed with TLV431AILPR cut tape?

A: Yes. Tape and reel packaging (TS431AIZT) and cut tape packaging (TS431IZT) contain identical components with different supply formats. The electrical specifications, pin configuration, and TO-92-3 package are identical. Packaging format selection depends on production volume and assembly process requirements, not electrical compatibility.