TL431CLP Replacement: TL431ACZ, TL431ACLPG

Original Part

TL431CLP

Texas Instruments

Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±2.2% 100 mA TO-92-3

Alternative Part

TL431ACZ

STMicroelectronics

Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±1% 100 mA TO-92-3

TL431ACLPG

onsemi

Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±1% 100 mA TO-92 (TO-226)

1. TL431ACZ Substitution Conclusion The TL431ACZ matches the original part in key parameters such as reference voltage and output current. However, it offers improved accuracy (±1% vs. ±2.2%) and a lower minimum cathode current requirement (600µA vs. 1mA), which may provide an advantage in low-power applications. Note that the package differs (TO-92-2 vs. TO-92-3 pinout may not be identical); if the physical pinouts are incompatible, direct substitution is not possible. In summary, if the circuit can accommodate the lower cathode current and the package is compatible, the TL431ACZ can be considered a performance upgrade. Otherwise, careful verification is required.

2. TL431ACLPG Substitution Conclusion The TL431ACLPG closely aligns with the original part in core specifications, including the 1mA cathode current. It provides enhanced accuracy (±1%) and adds a typical temperature coefficient specification (50ppm/°C), which was not defined for the original part. This offers more predictable performance in applications with stringent temperature stability requirements. The package remains TO-92-3, ensuring full physical compatibility. The TL431ACLPG is a drop-in replacement that delivers potential improvements in accuracy and temperature performance, making it a highly suitable alternative.

Analysis ID: C0D0-F841000

Based on part parameters and for reference only. Not to be used for procurement or production.