TLVH431ILP Equivalent & Substitute Parts

Part Overview

The TLVH431ILP is a shunt voltage reference IC manufactured by Texas Instruments, designed for precision voltage regulation applications. This adjustable reference device operates with a minimum output voltage of 1.24V and maximum of 18V, delivering up to 70mA output current with ±1.5% tolerance. The device is packaged in TO-92-3 (through-hole) configuration and is currently in Last Time Buy status, indicating end-of-life production. Finding equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs and long-term support.

Substiute Parts

TLVH431ILP

Texas InstrumentsIn Stock: 2904TLVH431ILP Datasheet

Current PartRFQ

TLVH431BCDBZR

Texas InstrumentsIn Stock: 29167TLVH431BCDBZR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLVH431ILP is determined by the following critical parameters that must remain functionally equivalent:

Core Electrical Parameters (Must Match):

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

Allowable Variations:

• Tolerance: Can be equal or tighter (±1.5% or better)
• Operating Temperature: Can be narrower range if application requirements permit
• Mounting Type: Can differ (through-hole to surface-mount acceptable if PCB design accommodates)
• Package / Case: Can differ if electrical footprint compatibility is maintained

The TLVH431BCDBZR qualifies as a direct substitute because it maintains all core electrical parameters while offering improved tolerance (±0.5% vs ±1.5%) and operates within a compatible temperature range for most applications.

Parameter Comparison

Engineering Selection Recommendations

The TLVH431BCDBZR is the manufacturer-recommended substitute for the TLVH431ILP. Both devices are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Selection Criteria:

The TLVH431BCDBZR maintains all critical electrical specifications required for functional equivalence. The improved tolerance specification (±0.5% vs ±1.5%) provides enhanced precision without compromising compatibility. The narrower operating temperature range (0°C ~ 70°C vs -40°C ~ 85°C) is acceptable for applications not requiring extended low-temperature operation.

The primary design consideration is the package transition from TO-92-3 (through-hole) to SOT-23-3 (surface-mount). This change requires PCB layout modification and is suitable for new production designs or redesigned assemblies. For applications requiring through-hole mounting, alternative through-hole shunt reference devices with matching electrical specifications should be evaluated.

The TLVH431ILP's Last Time Buy status makes the TLVH431BCDBZR the appropriate long-term supply solution, with significantly higher inventory availability (29,100 pcs vs 2,831 pcs).

Frequently Asked Questions (FAQ)

Q: Can the TLVH431BCDBZR directly replace the TLVH431ILP in existing designs?

A: Electrical substitution is direct. However, the package change from TO-92-3 to SOT-23-3 requires PCB redesign. The TLVH431BCDBZR cannot be used in existing through-hole footprints without adapter solutions.

Q: What is the impact of the tolerance difference (±1.5% vs ±0.5%)?

A: The TLVH431BCDBZR offers tighter tolerance, which improves output voltage accuracy. This is a performance enhancement and does not create compatibility issues. Designs tolerating ±1.5% will function correctly with ±0.5% devices.

Q: Does the operating temperature range difference affect compatibility?

A: The TLVH431BCDBZR operates from 0°C to 70°C, compared to the TLVH431ILP's -40°C to 85°C range. Substitution is valid for applications operating within 0°C to 70°C. Applications requiring operation below 0°C or above 70°C require alternative devices.

Q: Are both devices RoHS compliant?

A: Yes, both the TLVH431ILP and TLVH431BCDBZR are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: Why is the TLVH431BCDBZR recommended over the TLVH431ILP?

A: The TLVH431ILP is in Last Time Buy status, indicating end-of-life production. The TLVH431BCDBZR is an active product with superior availability and improved specifications, making it the appropriate choice for new designs and long-term supply continuity.

Q: What are the key electrical parameters that must match for substitution?

A: Reference type (Shunt), output type (Adjustable), minimum output voltage (1.24V), maximum output voltage (18V), output current (70mA), and cathode current (100µA) must all match for functional equivalence.