Original Part
Alternative Part
1. TL431BILPRAG Substitution Conclusion
The TL431BILPRAG can serve as a direct replacement for the TL431ILPG, as both devices share the same manufacturer (onsemi), are package-compatible (TO-92-3), and have identical core parameters including output voltage range (2.495V–36V), cathode current (1mA), and maximum output current (100mA). The primary improvement is the tightened reference accuracy, which is enhanced from ±2.2% to ±0.4%. In applications requiring higher voltage reference precision—such as precision power supplies or measurement circuits—this substitution can significantly improve system performance, though at a potentially slightly higher cost. Other characteristics, such as the typical temperature coefficient (50ppm/°C), remain unchanged, so no circuit modification is required and the devices can be swapped directly.
2. TL1431CLPE3 Substitution Conclusion
The TL1431CLPE3 is functionally compatible as a substitute for the TL431ILPG, but several key differences should be noted. First, the manufacturer changes to Texas Instruments (TI). Second, its nominal output voltage is specified as 2.5V compared to the original part’s 2.495V. Although this remains within the adjustable range and the accuracy is similarly ±0.4%, circuits relying on an exact 2.495V reference may experience a slight system offset after substitution. Additionally, its temperature coefficient is not explicitly specified, which could affect performance in applications with stringent temperature stability requirements. While the package is compatible (TO-92-3), minor variations in lead forming may exist. Overall, in applications tolerant of a small voltage deviation and not dependent on a specific temperature coefficient, the TL1431CLPE3 can be used as a direct replacement and offers the benefit of improved accuracy.
Analysis ID: 6E04-7237000
Based on part parameters and for reference only. Not to be used for procurement or production.
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