TLVH431AQLP Equivalent & Substitute Parts

Part Overview

The TLVH431AQLP is a shunt voltage reference IC manufactured by Texas Instruments, designed for precision voltage regulation applications. This adjustable reference provides a fixed output of 1.24V with a maximum output capability of 18V and supports output currents up to 70mA. The device operates across an industrial temperature range of -40°C to 125°C and is housed in a TO-92-3 through-hole package.

The TLVH431AQLP has reached Last Time Buy status, indicating end-of-life production. Identifying equivalent substitute parts is essential for design continuity, long-term supply chain planning, and new production runs where alternative packaging or mounting technologies may be preferred.

Substiute Parts

TLVH431AQLP

Texas InstrumentsIn Stock: 2588TLVH431AQLP Datasheet

Current PartRFQ

TLVH431AIDBZR

Texas InstrumentsIn Stock: 20784TLVH431AIDBZR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLVH431AQLP is determined by electrical parameter equivalence and functional compatibility. The following criteria establish valid substitutes:

Electrical Equivalence Requirements:

• Reference Type: Shunt (identical)
• Output Type: Adjustable (identical)
• Voltage - Output (Min/Fixed): 1.24V (identical)
• Voltage - Output (Max): 18V (identical)
• Current - Output: 70mA (identical)
• Tolerance: ±1% (identical)
• Current - Cathode: 100µA (identical)

Allowable Variations:

• Mounting Type: Through Hole or Surface Mount (functional equivalence)
• Package / Case: Different package styles permitted if electrical specifications match
• Operating Temperature: Minimum operating temperature may differ; maximum must support application requirements
• Product Status: Active or Last Time Buy status acceptable

The TLVH431AIDBZR qualifies as a direct electrical substitute, with the primary difference being packaging format (SOT-23-3 surface mount versus TO-92-3 through hole) and product lifecycle status (Active versus Last Time Buy).

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole Applications: The TLVH431AQLP remains the appropriate choice for existing through-hole designs. However, given Last Time Buy status, procurement planning should account for limited availability (2521 pcs in stock).

For New Designs or Surface Mount Migration: The TLVH431AIDBZR is the manufacturer-recommended substitute. This part maintains identical electrical specifications and is in Active product status, ensuring long-term availability. The SOT-23-3 package is suitable for modern PCB assembly processes. Note that the maximum operating temperature is reduced to 85°C; applications requiring operation above 85°C must retain the TLVH431AQLP or identify alternative solutions.

Compliance Considerations: Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

Frequently Asked Questions (FAQ)

Q: Can the TLVH431AIDBZR directly replace the TLVH431AQLP in existing designs?

A: Electrical substitution is valid. However, the TLVH431AIDBZR uses SOT-23-3 surface mount packaging versus the TO-92-3 through-hole package of the TLVH431AQLP. PCB layout and assembly process modifications are required. Additionally, the maximum operating temperature of the TLVH431AIDBZR is 85°C compared to 125°C for the TLVH431AQLP; verify application temperature requirements before substitution.

Q: What is the difference between TO-92-3 and SOT-23-3 packages?

A: TO-92-3 is a through-hole package with three leads designed for manual or wave soldering assembly. SOT-23-3 is a surface mount package with three leads designed for reflow soldering on modern PCB assembly equipment. The packages are not mechanically interchangeable without PCB redesign.

Q: Why is the TLVH431AQLP marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of this part number. Existing inventory will be sold until depletion, after which the part will no longer be available. The TLVH431AIDBZR is the active replacement for new designs and future production.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts share identical electrical specifications: 1.24V adjustable output, 18V maximum output, 70mA output current, ±1% tolerance, and 100µA cathode current. The only differences are packaging format, mounting technology, and maximum operating temperature.

Q: What inventory levels are available for each part?

A: The TLVH431AQLP has 2521 pcs in stock (Last Time Buy). The TLVH431AIDBZR has 20695 pcs in stock (Active status), providing significantly greater availability for ongoing production requirements.