TL1431CLPME3 Replacement: TL431BCLPRAG, TL431BCLPRMG

Original Part

TL1431CLPME3

Texas Instruments

Shunt Voltage Reference IC Adjustable 2.5V 36 VV ±0.4% 100 mA TO-92-3

Alternative Part

TL431BCLPRAG

onsemi

Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±0.4% 100 mA TO-92-3

TL431BCLPRMG

onsemi

Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±0.4% 100 mA TO-92-3

1. TL431BCLPRAG Substitution Conclusion The TL431BCLPRAG can directly replace the original part TL1431CLPME3. Both devices share identical key parameters: they are adjustable shunt references with a tolerance of ±0.4%, a maximum output voltage of 36V, an output current capability of 100mA, a minimum cathode current of 1mA, and are package-compatible. The only distinction lies in the minimum reference voltage, which is 2.5V for the original part and 2.495V for the TL431BCLPRAG, representing a negligible deviation of merely 0.2%. This difference is significantly smaller than the device's own ±0.4% initial accuracy and is inconsequential for the vast majority of applications. Furthermore, any potential offset can be easily compensated for via the external resistor network. Notably, the TL431BCLPRAG provides a specified typical temperature coefficient (50ppm/°C), whereas the original part's datasheet lacks this information. This actually gives the substitute part a more predictable temperature performance, which is beneficial for design.

2. TL431BCLPRMG Substitution Conclusion The TL431BCLPRMG can directly replace the original part TL1431CLPME3, and the conclusion is identical to that for the TL431BCLPRAG. Upon verification, all technical parameters of the TL431BCLPRMG—including the minimum reference voltage of 2.495V, tolerance, temperature coefficient, current ratings, and package—are exactly the same as those of the TL431BCLPRAG. The only difference is the suffix "M" versus "A" in the part number, which typically denotes different manufacturing lots, internal factory codes, or packaging methods and does not constitute any electrical or specification difference. Therefore, its feasibility as a substitute for the original part, the analysis of variances, and the associated implications are entirely consistent with the conclusion stated above for the TL431BCLPRAG.

Analysis ID: BA37-C1A3000

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