Original Part
Alternative Part
Shunt Voltage Reference IC Adjustable 2.5V 36 VV ±0.5% 100 mA SOT-23-3
Shunt Voltage Reference IC Adjustable 2.5V 36 VV ±0.5% 100 mA SOT-23-3
1. AN431AN-ATRE1 Substitution Conclusion
From the perspective of key electrical parameters, package, and functionality, the AN431AN-ATRE1 can serve as a direct replacement for the LM431SACM32X. Both are adjustable shunt voltage references with identical output voltage range (2.5V‑36V), output current (100mA), cathode operating current (1mA), and package (SOT‑23‑3). The primary differences lie in the AN431AN-ATRE1’s tighter initial accuracy (±0.5% vs ±2%) and improved temperature coefficient (20ppm/°C vs 50ppm/°C). This results in lower output voltage drift and better stability over a wide temperature range, which helps enhance overall system accuracy and thermal performance. This substitution represents a performance upgrade and is typically pin‑to‑pin compatible.
2. AS431ANTR-E1 Substitution Conclusion
The AS431ANTR-E1 is also a viable direct replacement for the LM431SACM32X. Its basic specifications—adjustable shunt reference, 2.5V‑36V output, 100mA current capability, 1mA cathode current, and SOT‑23‑3 package—fully match the original part. Similar to the AN431AN-ATRE1, the AS431ANTR-E1 offers superior initial accuracy (±0.5%) and a lower temperature coefficient (20ppm/°C). This indicates that it can deliver a more accurate and stable reference voltage across the entire operating temperature range, helping to reduce system error and improve temperature adaptability. The substitution is both electrically and mechanically compatible and provides a measurable performance improvement.
Analysis ID: 1DCE-63B8000
Based on part parameters and for reference only. Not to be used for procurement or production.
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