TL431CP-J Equivalent & Substitute Parts

Part Overview

The TL431CP-J is a shunt voltage reference integrated circuit manufactured by Texas Instruments, classified as a Power Management (PMIC) component. This device functions as an adjustable voltage reference with a fixed output of 2.495V and maximum output capability of 36V, delivering up to 100mA of output current. The TL431CP-J is packaged in an 8-DIP through-hole configuration and operates across a temperature range of 0°C to 70°C.

The TL431CP-J carries an obsolete product status. Locating equivalent substitute parts is necessary for applications requiring continued component availability, design updates, or board redesigns where modern packaging and active product support are advantageous.

Substiute Parts

TL431CP-J

Texas InstrumentsIn Stock: 961TL431CP-J Datasheet

Current PartRFQ

TL431CDBZR

Texas InstrumentsIn Stock: 26288TL431CDBZR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL431CP-J is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Reference type must be shunt
• Output type must be adjustable
• Minimum output voltage must be 2.495V
• Maximum output voltage must be 36V
• Output current capability must be 100mA
• Cathode current must be 1mA
• Operating temperature range must encompass 0°C to 70°C
• Tolerance specification must be ±2% or tighter

Mechanical Compatibility Criteria:

• Base product number must be TL431 (same functional family)
• Regulatory compliance (REACH, ECCN, HTSUS codes) must align

The TL431CDBZR qualifies as a direct electrical substitute while offering a modern surface-mount package alternative to the through-hole configuration of the TL431CP-J.

Parameter Comparison

Engineering Selection Recommendations

The TL431CDBZR serves as the primary substitute for the obsolete TL431CP-J. Both components share identical electrical specifications across all critical parameters: shunt reference type, adjustable output, 2.495V minimum output, 36V maximum output, 100mA output current, and 1mA cathode current. Both operate within the 0°C to 70°C temperature range and maintain regulatory compliance under REACH, EAR99, and HTSUS classifications.

The principal distinction between these parts is packaging and product status. The TL431CP-J utilizes through-hole 8-DIP packaging and carries obsolete status. The TL431CDBZR employs surface-mount SOT-23-3 packaging and maintains active product status with current manufacturing support.

The tolerance specification of the TL431CDBZR is ±2.2%, compared to ±2% for the TL431CP-J. This 0.2% tolerance difference remains within acceptable margins for shunt voltage reference applications where the output voltage is typically set through external resistor networks.

Selection of the TL431CDBZR is appropriate for new designs, board redesigns, or applications where surface-mount technology and active product support are required. The through-hole TL431CP-J remains suitable only for legacy systems where the original package form factor is mandated.

Frequently Asked Questions (FAQ)

Q: Can the TL431CDBZR directly replace the TL431CP-J in existing through-hole PCB designs?

A: Direct PCB replacement is not possible due to package incompatibility. The TL431CP-J uses 8-DIP through-hole packaging while the TL431CDBZR uses SOT-23-3 surface-mount packaging. PCB redesign or adapter solutions are required for substitution.

Q: Are the electrical specifications identical between TL431CP-J and TL431CDBZR?

A: Electrical specifications are functionally equivalent. Both devices provide 2.495V minimum output, 36V maximum output, 100mA output current, and 1mA cathode current across the 0°C to 70°C operating range. The TL431CDBZR tolerance is ±2.2% versus ±2% for the TL431CP-J, a difference of 0.2% that does not affect functional compatibility in typical applications.

Q: Why is the TL431CP-J listed as obsolete?

A: The TL431CP-J carries obsolete status, indicating Texas Instruments has discontinued manufacturing and support for this specific part number. The TL431CDBZR represents the active product line continuation with modern packaging.

Q: What are the regulatory compliance differences between these parts?

A: Both parts share identical regulatory classifications: REACH Unaffected, ECCN EAR99, and HTSUS 8542.39.0001. The TL431CDBZR additionally carries RoHS3 compliance certification and MSL 1 (Unlimited) moisture sensitivity rating, reflecting modern manufacturing standards.

Q: Can the TL431CDBZR be used in applications originally designed for the TL431CP-J?

A: Electrical substitution is valid provided the application circuit topology accommodates the SOT-23-3 package form factor. The three-pin configuration (cathode, reference, and adjustment) remains consistent between both parts. Circuit board layout and PCB design modifications are necessary.

Q: What is the significance of the 1mA cathode current specification?

A: The 1mA cathode current represents the minimum operating current required to maintain stable reference voltage output. Both the TL431CP-J and TL431CDBZR specify this parameter identically, ensuring functional equivalence in current-limiting applications.