Original Part
Alternative Part
Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±0.5% 100 mA TO-92-3
1. TL431AILPME3 Substitution Conclusion
The TL431AILPME3 can generally serve as a replacement for the original part (onsemi TL431AILPRPG). Key parameters such as reference voltage (2.495V), output range (36V), tolerance (±1%), and package (TO-92-3) are identical. However, two main differences exist: first, the cathode operating current (700µA for TI vs. 1mA for onsemi). The TI version may offer an advantage in low-power applications, provided the circuit’s minimum operating current meets its requirement. Second, TI does not specify a temperature coefficient, whereas onsemi provides a typical value of 50ppm/°C. This omission may introduce uncertainty in voltage stability across a wide temperature range for the TI device; if the application is sensitive to temperature drift, further verification is recommended. Overall, substitution is acceptable for general precision and voltage regulation applications, but attention should be paid to whether low-temperature-drift requirements are met.
2. TL431BILPRE3 Substitution Conclusion
The TL431BILPRE3 is functionally compatible as a replacement and offers higher tolerance accuracy (±0.5% vs. ±1%), enabling a more precise reference voltage. However, it similarly presents differences in cathode current (700µA for TI vs. 1mA for onsemi) and lacks a specified temperature coefficient. Its higher precision makes it advantageous in applications requiring tighter voltage reference performance. Nevertheless, the undefined temperature drift parameter may affect performance consistency in varying temperature environments. If the original design relies on onsemi’s typical 50ppm/°C value, the actual temperature drift of the TI device should be evaluated for acceptability. Replacement is feasible, particularly where improved accuracy is desired, but caution and validation are advised for wide-temperature-range applications.
Analysis ID: 18BA-1566000
Based on part parameters and for reference only. Not to be used for procurement or production.
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