TLVH431AILPR Equivalent & Substitute Parts

Part Overview

The TLVH431AILPR is a shunt voltage reference IC manufactured by Texas Instruments, designed for power management applications requiring adjustable voltage reference functionality. This device operates with an adjustable output range from 1.24V to 18V, delivering up to 70mA output current with ±1% tolerance. The component is packaged in TO-92-3 (through-hole) configuration and is currently classified as Last Time Buy, indicating end-of-life status. Finding equivalent substitute parts is necessary to ensure continued design support and maintain supply chain continuity for new production runs and long-term availability.

Substiute Parts

TLVH431AILPR

Texas InstrumentsIn Stock: 3117TLVH431AILPR Datasheet

Current PartRFQ

TLVH431AQDBZR

Texas InstrumentsIn Stock: 29505TLVH431AQDBZR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLVH431AILPR is determined by the following critical parameters:

• Reference Type: Shunt (must match)
• Output Type: Adjustable (must match)
• Voltage - Output (Min/Fixed): 1.24V (must match)
• Voltage - Output (Max): 18V (must match)
• Current - Output: 70mA (must match)
• Tolerance: ±1% (must match)
• Current - Cathode: 100µA (must match)
• Base Product Number: TLVH431 (same functional family)

The TLVH431AQDBZR qualifies as a direct substitute because it maintains identical electrical specifications across all critical parameters. The primary difference is packaging format: the substitute uses SOT-23-3 surface-mount packaging instead of TO-92-3 through-hole packaging, and operates across an extended temperature range (-40°C ~ 125°C versus -40°C ~ 85°C). Both devices share the same base product number (TLVH431) and are manufactured by Texas Instruments.

Parameter Comparison

Engineering Selection Recommendations

The TLVH431AQDBZR is the manufacturer-recommended substitute for the TLVH431AILPR. Both devices maintain identical electrical performance specifications and share ROHS3 compliance certification. The substitute offers the advantage of Active product status, ensuring long-term availability and continued manufacturing support, whereas the original part is designated Last Time Buy.

Selection between these parts depends on circuit board design requirements:

• Retain TLVH431AILPR only if through-hole mounting is mandatory for existing PCB designs or manual assembly processes.
• Transition to TLVH431AQDBZR for new designs, production restarts, or when surface-mount assembly is available. The extended operating temperature range (-40°C ~ 125°C) provides additional thermal margin compared to the original specification (-40°C ~ 85°C).

Both parts are manufactured by Texas Instruments and carry identical regulatory classifications (EAR99, HTSUS 8542.39.0001).

Frequently Asked Questions (FAQ)

Q: Can TLVH431AQDBZR be used as a direct replacement for TLVH431AILPR in existing designs?

A: Electrical substitution is valid. The TLVH431AQDBZR maintains all critical electrical parameters: 1.24V minimum output, 18V maximum output, 70mA current capability, ±1% tolerance, and 100µA cathode current. However, physical substitution requires PCB redesign because the original uses through-hole TO-92-3 packaging while the substitute uses surface-mount SOT-23-3 packaging. Pin-to-pin electrical compatibility exists, but board layout modification is necessary.

Q: What is the difference in operating temperature range between these parts?

A: The TLVH431AILPR operates from -40°C to 85°C, while the TLVH431AQDBZR operates from -40°C to 125°C. The substitute provides a 40°C extended upper temperature limit. For applications operating within the original -40°C to 85°C range, both parts perform identically. For applications requiring operation above 85°C, only the TLVH431AQDBZR is suitable.

Q: Why is TLVH431AILPR marked as Last Time Buy?

A: Last Time Buy status indicates Texas Instruments has discontinued this product line in TO-92-3 through-hole packaging. The TLVH431AQDBZR represents the active product continuation in surface-mount format. Existing inventory of TLVH431AILPR is available for final purchases, but no future manufacturing is planned.

Q: Are there any compliance or certification differences?

A: Both parts carry identical compliance certifications: ROHS3 Compliant, REACH Unaffected, and EAR99 classification. No regulatory differences exist between the two parts.

Q: What packaging considerations apply to this substitution?

A: The TLVH431AILPR uses TO-92-3 through-hole packaging suitable for manual insertion or wave soldering. The TLVH431AQDBZR uses SOT-23-3 surface-mount packaging requiring reflow soldering and SMT assembly equipment. PCB footprint, trace routing, and assembly process specifications differ significantly between these package types.