Original Part
Alternative Part
Shunt Voltage Reference IC Adjustable 2.5V 36 VV ±0.4% 100 mA SOT-23-3
1. AZ431AN-ATRG1 Substitution Conclusion
The AZ431AN-ATRG1 serves as a high-performance direct replacement for the KA431SLMF2TF. It maintains full compatibility in core electrical specifications (output voltage range, output current) and package (SOT-23-3 pin-to-pin compatible). The key differentiators are its superior initial accuracy (±0.4% vs. ±0.5%) and a significantly lower typical temperature coefficient (20ppm/°C vs. 50ppm/°C). Under identical conditions, the AZ431AN-ATRG1 provides a more precise and stable reference voltage. Particularly in applications sensitive to temperature variation, its output voltage exhibits less drift with ambient temperature changes, leading to superior overall system performance. Therefore, it enables a seamless upgrade and replacement.
2. ATL432BIDBZR Substitution Conclusion
The ATL432BIDBZR is a functionally viable alternative but constitutes a conditional replacement requiring careful evaluation. Its primary advantage and core deviation lie in its extremely low cathode operating current (80µA vs. 1mA), which can significantly reduce system standby power consumption—especially beneficial for battery-powered devices. Its temperature coefficient (48ppm/°C) is comparable to the original part. This difference also introduces a critical consideration: if the original circuit design strictly relies on the 1mA cathode current to bias or set the operating point of peripheral components (e.g., divider resistors), direct substitution may cause reference instability or degraded accuracy. Prior to replacement, the peripheral circuitry must be re-evaluated and confirmed to operate correctly with an 80µA cathode current; otherwise, resistor values may need adjustment.
Analysis ID: 1BE8-FD35000
Based on part parameters and for reference only. Not to be used for procurement or production.
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