Original Part
Alternative Part
1. TL1431IZ Substitution Conclusion
From the perspective of key electrical parameters and package, the TL1431IZ can serve as a replacement for the original part and represents a performance-enhanced substitution. The differences lie in the initial accuracy (±0.4% vs. ±2.2%) and a well-defined temperature coefficient (100ppm/°C vs. unspecified). The TL1431IZ provides a more precise and stable voltage reference, making it particularly suitable for circuits demanding higher voltage accuracy and temperature stability. It should be noted that its package is marked as TO-92-2, but it is actually a three-pin TO-92. Physical compatibility requires verification of the pinout (typically identical), and the cost may be higher than the original part.
2. TL431CZ Substitution Conclusion
The TL431CZ is a direct and equivalent substitute. It is nearly identical to the original TL431CLP in all critical parameters, including output voltage range (2.495V-36V), output current (100mA), initial accuracy (±2.21% vs. ±2.2%), and package (TO-92-3). In the vast majority of application circuits, these two parts can be swapped pin-for-pin and function-for-function, with performance being essentially identical. They are effectively different manufacturer versions of the same standard product.
Analysis ID: CC0C-79A1000
Based on part parameters and for reference only. Not to be used for procurement or production.
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