TLV431CLPR Equivalent & Substitute Parts

Part Overview

The TLV431CLPR is a shunt voltage reference IC manufactured by Texas Instruments, designed for adjustable voltage regulation applications. This device provides a fixed minimum output of 1.24V with adjustable maximum output up to 6V, delivering 15mA output current with ±1.5% tolerance. The part is packaged in TO-92-3 (through-hole) configuration and operates across 0°C to 70°C.

The TLV431CLPR is classified as Last Time Buy, indicating discontinued production. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Substiute Parts

TLV431CLPR

Texas InstrumentsIn Stock: 38931TLV431CLPR Datasheet

Current PartRFQ

TLV431IDBZR

Texas InstrumentsIn Stock: 21506TLV431IDBZR Datasheet

MFR RecommendedRFQ

TS431AIZ-AP

STMicroelectronicsIn Stock: 1122TS431AIZ-AP Datasheet

MFR RecommendedRFQ

TS431AIZT

STMicroelectronicsIn Stock: 55282TS431AIZT Datasheet

MFR RecommendedRFQ

TS431IZ-AP

STMicroelectronicsIn Stock: 907TS431IZ-AP Datasheet

MFR RecommendedRFQ

TS431IZT

STMicroelectronicsIn Stock: 5126TS431IZT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLV431CLPR is determined by the following criteria:

Primary Compatibility Parameters:

• Reference Type: Shunt (all substitutes must be shunt-type references)
• Output Type: Adjustable (voltage must be user-adjustable)
• Voltage Range: Minimum 1.24V, maximum 6V (output range must encompass or match the original)
• Current - Output: Minimum 15mA (substitutes with higher output current are acceptable)
• Tolerance: ±1.5% or better (tighter tolerance is acceptable; looser tolerance is not)
• Current - Cathode: 80µA or lower (lower cathode current is acceptable)

Secondary Compatibility Parameters:

• Mounting Type: Through Hole (mechanical compatibility with PCB layout)
• Package / Case: TO-92-3 (physical form factor)
• RoHS Compliance: ROHS3 Compliant (regulatory requirement)

Temperature Operating Range Consideration: The original part operates 0°C ~ 70°C. Substitutes with extended temperature ranges (-40°C ~ 85°C or -40°C ~ 125°C) are functionally compatible and provide enhanced performance margin.

Parameter Comparison

Engineering Selection Recommendations

Direct Through-Hole Substitutes (Same Package):

TS431AIZ-AP and TS431AIZT are the primary through-hole substitutes. Both maintain TO-92-3 package compatibility and offer improved specifications: ±1% tolerance (versus ±1.5%), 30mA output current (versus 15mA), and extended operating temperature range (-40°C ~ 125°C). These parts are manufactured by STMicroelectronics and carry Active product status with full ROHS3 compliance.

TS431IZ-AP and TS431IZT provide alternative through-hole options with ±2% tolerance and identical output current and temperature specifications as the TS431AI variants. These parts are suitable where the relaxed tolerance is acceptable within circuit design margins.

Surface-Mount Alternative:

TLV431IDBZR is a Texas Instruments part in SOT-23-3 surface-mount package. This substitute is electrically equivalent to the original (±1.5% tolerance, 15mA output) but requires PCB redesign for surface-mount assembly. This option is applicable only when board layout modifications are feasible.

Inventory Availability:

TS431AIZT offers the highest inventory (55,200 pcs), followed by TLV431IDBZR (21,400 pcs). TS431AIZ-AP and TS431IZT provide moderate availability (1,024 and 5,071 pcs respectively).

Frequently Asked Questions (FAQ)

Q: Can TS431AIZ-AP directly replace TLV431CLPR in existing designs?

A: Yes, for through-hole PCB layouts. TS431AIZ-AP maintains identical TO-92-3 package pinout and electrical output range (1.24V to 6V adjustable). The improved ±1% tolerance and higher 30mA output current provide enhanced performance margins. No circuit modifications are required.

Q: What is the difference between TS431AIZ-AP and TS431IZ-AP?

A: Both are STMicroelectronics parts in TO-92-3 package with identical pinout and output current (30mA). The primary difference is tolerance: TS431AIZ-AP specifies ±1% while TS431IZ-AP specifies ±2%. Selection depends on circuit tolerance requirements. Both operate across -40°C ~ 125°C.

Q: Why is TLV431IDBZR listed as a substitute if it uses a different package?

A: TLV431IDBZR is electrically equivalent (Texas Instruments manufacture, ±1.5% tolerance, 15mA output, 1.24V to 6V range) but requires PCB redesign due to SOT-23-3 surface-mount package versus TO-92-3 through-hole. This option applies only when board layout modifications are planned.

Q: Are the STMicroelectronics TS431 parts pin-compatible with the TLV431CLPR?

A: Yes. TS431AIZ-AP, TS431AIZT, TS431IZ-AP, and TS431IZT all use TO-92-3 package with identical pinout to TLV431CLPR. Direct socket substitution is possible without PCB modifications.

Q: What is the significance of the extended temperature range in substitute parts?

A: The original TLV431CLPR operates 0°C ~ 70°C. Substitute parts with -40°C ~ 125°C range provide wider environmental tolerance and are functionally compatible across the original operating window. Extended range does not affect circuit operation within the original temperature specification.

Q: Can I use a substitute with higher output current (30mA vs 15mA)?

A: Yes. Higher output current capability is a performance enhancement. The circuit will draw only the current it requires; the 30mA rating indicates maximum available current, not forced current draw. This provides design margin for future modifications.

Q: What packaging options are available for this substitution?

A: Through-hole TO-92-3 packages are available from both Texas Instruments (TLV431IDBZR alternative aside) and STMicroelectronics (TS431 series). Surface-mount SOT-23-3 is available only from Texas Instruments (TLV431IDBZR) and requires board redesign.