TLVH431AQLPR Equivalent & Substitute Parts

Part Overview

The TLVH431AQLPR is a shunt voltage reference IC manufactured by Texas Instruments, designed for adjustable voltage regulation applications. This component provides a fixed minimum output of 1.24V with a maximum output capability of 18V, delivering up to 70mA output current with ±1% tolerance. The device is packaged in TO-92-3 (through-hole) configuration and operates across the industrial temperature range of -40°C to 125°C.

The TLVH431AQLPR is currently designated as Last Time Buy, indicating limited future availability. Identifying equivalent and substitute parts is necessary to ensure design continuity and support long-term production requirements.

Substiute Parts

TLVH431AQLPR

Texas InstrumentsIn Stock: 2671TLVH431AQLPR Datasheet

Current PartRFQ

TLVH431AQDBZR

Texas InstrumentsIn Stock: 29505TLVH431AQDBZR Datasheet

MFR RecommendedRFQ

AZ431LBZTR-E1

Diodes IncorporatedIn Stock: 61478AZ431LBZTR-E1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLVH431AQLPR is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Reference Type: Shunt (must match)
• Output Type: Adjustable (must match)
• Voltage - Output (Min/Fixed): 1.24V (must match)
• Voltage - Output (Max): 18V (must match)
• Tolerance: ±1% (must match)
• Operating Temperature: -40°C to 125°C (must match)

Mechanical Compatibility Requirements:

• Mounting Type: Through Hole (for direct pin-compatible substitution)
• Package / Case: TO-92-3 (for direct footprint compatibility)

Acceptable Variations:

• Current - Output: May exceed 70mA (higher current capability is acceptable)
• Current - Cathode: May differ within functional range
• Product Status: Active or Obsolete parts are acceptable if electrical and mechanical parameters match

Two substitute parts meet these criteria with different packaging considerations.

Parameter Comparison

Engineering Selection Recommendations

TLVH431AQDBZR (Texas Instruments, Active Status)

This part is electrically equivalent to the TLVH431AQLPR with identical electrical specifications. However, it uses SOT-23-3 surface-mount packaging instead of TO-92-3 through-hole packaging. Selection of this substitute requires PCB redesign to accommodate surface-mount footprint. This part carries Active product status, ensuring long-term availability and supply continuity. ROHS3 compliance and REACH Unaffected status are maintained.

AZ431LBZTR-E1 (Diodes Incorporated, Obsolete Status)

This part maintains electrical equivalence with the TLVH431AQLPR, including identical TO-92-3 through-hole packaging for direct footprint compatibility. Output current capability is increased to 100mA, which exceeds the original specification and is functionally acceptable. Temperature coefficient is specified at 20ppm/°C typical, providing additional performance data. However, this part is designated Obsolete, indicating discontinued manufacturing and limited future availability. ROHS3 compliance and REACH Unaffected status are maintained.

Frequently Asked Questions (FAQ)

Q: Can TLVH431AQDBZR be used as a direct replacement for TLVH431AQLPR?

A: TLVH431AQDBZR is electrically equivalent but requires PCB redesign. The main part uses TO-92-3 through-hole packaging, while the substitute uses SOT-23-3 surface-mount packaging. Footprints are not compatible without circuit board modification.

Q: Is AZ431LBZTR-E1 a pin-compatible substitute?

A: Yes. AZ431LBZTR-E1 maintains TO-92-3 through-hole packaging identical to TLVH431AQLPR, providing direct pin and footprint compatibility. No PCB redesign is required for mechanical integration.

Q: What is the significance of the higher 100mA output current in AZ431LBZTR-E1?

A: The AZ431LBZTR-E1 provides 100mA output current compared to 70mA in the original part. This increased capability is functionally acceptable and does not create compatibility issues. Applications requiring only 70mA or less will operate within the substitute's specifications.

Q: Why is AZ431LBZTR-E1 listed as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. While inventory may be available from distributors, future procurement cannot be guaranteed. This status should be considered when selecting substitutes for long-term production requirements.

Q: Are all three parts RoHS3 compliant?

A: Yes. TLVH431AQLPR, TLVH431AQDBZR, and AZ431LBZTR-E1 are all ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Q: What is the primary reason to substitute the TLVH431AQLPR?

A: The TLVH431AQLPR is designated Last Time Buy, indicating limited future availability. Substitution ensures design continuity and supports ongoing production beyond the manufacturer's end-of-life date.