TLVH431BQLP Equivalent & Substitute Parts

Part Overview

The TLVH431BQLP is a shunt voltage reference IC manufactured by Texas Instruments, designed for adjustable voltage regulation applications. This device provides a fixed output voltage of 1.24V with adjustable capability up to 18V, delivering up to 70mA output current with ±0.5% tolerance. The component is packaged in TO-92-3 (through-hole) configuration and operates across the industrial temperature range of -40°C to 125°C.

The TLVH431BQLP is currently designated as Last Time Buy, indicating end-of-life status. Identifying suitable substitute components is necessary for design continuity, inventory management, and long-term product support.

Substiute Parts

TLVH431BQLP

Texas InstrumentsIn Stock: 1108TLVH431BQLP Datasheet

Current PartRFQ

TLV431BQDBZR

Texas InstrumentsIn Stock: 76406TLV431BQDBZR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLVH431BQLP 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)
• Tolerance: ±0.5% (must match)
• Current - Cathode: 100µA (must match)
• Operating Temperature Range: -40°C to 125°C (must match)
• RoHS Status: ROHS3 Compliant (must match)

The TLV431BQDBZR qualifies as a manufacturer-recommended substitute. While it shares the same base product number (TLV431) and maintains identical electrical characteristics for the core reference function, it differs in packaging format (SOT-23-3 surface mount versus TO-92-3 through hole) and maximum voltage/current ratings. These differences require circuit-level evaluation for compatibility.

Parameter Comparison

Engineering Selection Recommendations

The TLV431BQDBZR is the manufacturer-recommended substitute for the TLVH431BQLP. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment.

Selection of the TLV431BQDBZR requires evaluation of the following circuit-level constraints:

• Maximum output voltage requirement: The substitute supports up to 6V versus the original 18V. Applications requiring output voltages exceeding 6V are not compatible with this substitute.
• Maximum output current requirement: The substitute delivers 15mA versus the original 70mA. Applications requiring output currents exceeding 15mA are not compatible with this substitute.
• Mounting technology: The substitute uses surface-mount SOT-23-3 packaging, requiring PCB redesign if the original design uses through-hole TO-92-3 footprints.

The TLV431BQDBZR is suitable for applications where output voltage remains below 6V and output current remains below 15mA. The active product status of the TLV431BQDBZR ensures long-term availability and supply chain stability compared to the Last Time Buy status of the TLVH431BQLP.

Frequently Asked Questions (FAQ)

Q: Can the TLV431BQDBZR directly replace the TLVH431BQLP in existing designs?

A: Direct replacement depends on circuit requirements. The core reference function is identical, but the substitute has lower maximum voltage (6V vs 18V) and current (15mA vs 70mA) ratings. If your application operates within these limits, substitution is feasible. Mounting technology differs (surface mount vs through hole), requiring PCB modification.

Q: What are the key electrical differences between these parts?

A: The reference voltage (1.24V), tolerance (±0.5%), cathode current (100µA), and operating temperature range (-40°C to 125°C) are identical. The primary differences are maximum output voltage (18V vs 6V) and maximum output current (70mA vs 15mA).

Q: Are both parts RoHS compliant?

A: Yes. Both the TLVH431BQLP and TLV431BQDBZR are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Why is the TLVH431BQLP designated as Last Time Buy?

A: Last Time Buy status indicates the manufacturer is discontinuing this product. The TLV431BQDBZR, with active product status, represents the current production alternative from Texas Instruments.

Q: What packaging considerations apply to substitution?

A: The TLVH431BQLP uses through-hole TO-92-3 packaging for manual or wave soldering. The TLV431BQDBZR uses surface-mount SOT-23-3 packaging for reflow soldering. PCB redesign is necessary if switching between these mounting technologies.

Q: Can I use the TLV431BQDBZR in high-voltage applications above 6V?

A: No. The TLV431BQDBZR maximum output voltage is 6V. Applications requiring higher output voltages are not compatible with this substitute.