TL431CLP-Z Equivalent & Substitute Parts

Part Overview

The TL431CLP-Z is a shunt voltage reference IC with adjustable output, manufactured by Texas Instruments. This component operates as a precision voltage reference in power management applications, offering an adjustable output range from 2.495V to 36V with ±2% tolerance. The device is packaged in TO-92-3 (through-hole) configuration and is currently classified as Last Time Buy, indicating end-of-life status. Due to this product status, identifying functionally equivalent alternatives is essential for design continuity and long-term supply chain planning.

Substiute Parts

TL431CLP-Z

Texas InstrumentsIn Stock: 15022TL431CLP-Z Datasheet

Current PartRFQ

TL431BIDBZR

Texas InstrumentsIn Stock: 125372TL431BIDBZR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL431CLP-Z is determined by the following critical parameters that must remain consistent:

• Reference Type: Shunt voltage reference (functional equivalence)
• Output Type: Adjustable output configuration
• Voltage Range: Minimum output 2.495V, maximum output 36V
• Current - Output: 100 mA capability
• Base Product Number: TL431 (same device family)
• Compliance: ROHS3 Compliant, REACH Unaffected

The TL431BIDBZR qualifies as a substitute based on these core parameters. While it differs in packaging (SOT-23-3 surface mount versus TO-92-3 through hole), tolerance specification (±0.5% versus ±2%), and operating temperature range, these differences represent improvements or design variations rather than functional incompatibilities. The substitute maintains the same voltage reference range, output current capability, and base product family designation.

Parameter Comparison

Engineering Selection Recommendations

The TL431BIDBZR is the manufacturer-recommended substitute for the TL431CLP-Z. Selection between these parts should be based on the following factors:

For TL431CLP-Z retention: Use only when through-hole mounting is mandatory and surface-mount conversion is not feasible. Inventory availability is limited (14,941 pcs), and product status is Last Time Buy.

For TL431BIDBZR adoption: This part is the preferred choice for new designs and ongoing production. It maintains active product status with significantly higher inventory (125,300 pcs), ensuring supply continuity. The improved tolerance specification (±0.5% versus ±2%) provides superior accuracy without additional cost. Extended operating temperature range (-40°C to 85°C versus 0°C to 70°C) supports broader application environments. Both parts maintain identical ROHS3 and REACH compliance certifications.

The primary design consideration is mounting technology: through-hole versus surface-mount. PCB layout and assembly process capabilities determine which package is appropriate.

Frequently Asked Questions (FAQ)

Q: Can TL431BIDBZR directly replace TL431CLP-Z in existing designs?

A: Electrical substitution is valid. The TL431BIDBZR maintains identical voltage reference range (2.495V to 36V), output current (100 mA), and adjustable output configuration. However, package conversion from TO-92-3 (through-hole) to SOT-23-3 (surface-mount) requires PCB redesign and assembly process modification.

Q: What is the significance of the tolerance difference (±2% versus ±0.5%)?

A: Both tolerance specifications are provided parameters for these parts. The TL431BIDBZR offers tighter tolerance, which may improve circuit accuracy in applications requiring precision voltage reference performance. Design requirements determine whether this improvement is necessary.

Q: Are there temperature range limitations when substituting?

A: The TL431CLP-Z operates from 0°C to 70°C, while TL431BIDBZR operates from -40°C to 85°C. The substitute supports a wider temperature range, making it suitable for applications requiring extended temperature operation. If the original design operates only within 0°C to 70°C, the substitute remains fully compatible.

Q: What is the cathode current difference between these parts?

A: TL431CLP-Z requires 1 mA cathode current, while TL431BIDBZR requires 700 µA. This difference reflects manufacturing process variations between package types. Both values are provided specifications and should be used in circuit design calculations.

Q: Why is TL431CLP-Z classified as Last Time Buy?

A: Last Time Buy status indicates the manufacturer is discontinuing this product. TL431BIDBZR, with Active status, represents the ongoing product line. For supply chain continuity, TL431BIDBZR is the recommended long-term solution.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both TL431CLP-Z and TL431BIDBZR are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.