TLVH431ILPR Equivalent & Substitute Parts

Part Overview

The TLVH431ILPR is a shunt voltage reference IC manufactured by Texas Instruments, designed for precision voltage regulation and reference 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. Identifying qualified substitute parts is essential for design continuity and long-term supply chain reliability.

Substiute Parts

TLVH431ILPR

Texas InstrumentsIn Stock: 2785TLVH431ILPR Datasheet

Current PartRFQ

TLV431BQDBZR

Texas InstrumentsIn Stock: 76406TLV431BQDBZR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLVH431ILPR is determined by the following critical parameters:

Core Functional Parameters:

• Reference Type: Shunt (must remain shunt topology)
• Output Type: Adjustable (must support adjustable voltage output)
• Voltage - Output (Min/Fixed): 1.24V (minimum output voltage requirement)
• Current - Cathode: 100µA (cathode current specification)

Electrical Performance Parameters:

• Voltage - Output (Max): Must equal or exceed 18V
• Current - Output: Must equal or exceed 70mA
• Tolerance: Must equal or exceed ±1.5% (lower tolerance values are acceptable)
• Operating Temperature: Must cover -40°C ~ 85°C minimum range

Physical & Compliance Parameters:

• Base Product Number: TLV431 series (same device family)
• RoHS Status: ROHS3 Compliant (regulatory requirement)

The TLV431BQDBZR qualifies as a substitute based on matching core functional parameters and base product family, though with trade-offs in electrical performance specifications.

Parameter Comparison

Engineering Selection Recommendations

TLVH431ILPR (Main Part):

• Current product status is Last Time Buy, indicating discontinued production
• Suitable for existing designs requiring through-hole mounting and TO-92-3 package
• Supports higher voltage (18V) and current (70mA) requirements
• ROHS3 compliant for regulatory requirements

TLV431BQDBZR (Substitute):

• Active production status ensures long-term availability and supply chain stability
• Surface mount SOT-23-3 package requires PCB redesign from through-hole configuration
• Reduced maximum voltage rating (6V) and output current (15mA) limit applicability to lower-power designs
• Superior tolerance specification (±0.5%) provides enhanced precision
• Extended operating temperature range (-40°C ~ 125°C) supports broader thermal environments
• ROHS3 compliant for regulatory requirements

Selection between these parts depends on design constraints: the main part suits existing through-hole designs with higher voltage/current demands, while the substitute is appropriate for new surface-mount designs with lower electrical requirements and extended temperature operation.

Frequently Asked Questions (FAQ)

Q: Can TLV431BQDBZR directly replace TLVH431ILPR in existing designs?

A: Direct replacement is not possible without PCB modification. The TLVH431ILPR uses through-hole TO-92-3 packaging, while TLV431BQDBZR uses surface-mount SOT-23-3 packaging. Additionally, the substitute has reduced maximum voltage (6V vs 18V) and output current (15mA vs 70mA) ratings. Substitution is only viable if the application operates within the TLV431BQDBZR electrical specifications and PCB redesign is feasible.

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

A: The primary differences are: (1) Maximum output voltage: TLVH431ILPR supports 18V while TLV431BQDBZR supports 6V; (2) Output current: TLVH431ILPR delivers 70mA while TLV431BQDBZR delivers 15mA; (3) Tolerance: TLVH431ILPR has ±1.5% while TLV431BQDBZR has ±0.5%; (4) Operating temperature: TLVH431ILPR operates -40°C to 85°C while TLV431BQDBZR operates -40°C to 125°C.

Q: Why is the TLVH431ILPR in Last Time Buy status?

A: Last Time Buy status indicates Texas Instruments has discontinued this product line. The TLV431 series represents the active product family. Designers should transition to active alternatives for new designs to ensure long-term supply availability.

Q: Are both parts RoHS compliant?

A: Yes, both TLVH431ILPR and TLV431BQDBZR are ROHS3 compliant, meeting current regulatory requirements for hazardous substance restrictions.

Q: What mounting considerations apply to substitution?

A: TLVH431ILPR is through-hole mounted (TO-92-3), suitable for breadboards and traditional PCB designs. TLV431BQDBZR is surface-mount (SOT-23-3), requiring reflow soldering and PCB redesign. Through-hole and surface-mount technologies are not interchangeable without significant design modification.

Q: Can I use TLV431BQDBZR in applications requiring 18V output?

A: No. TLV431BQDBZR has a maximum output voltage rating of 6V. Using it in applications requiring 18V output violates the device specification and will result in failure or unreliable operation.