1. TLV431ACDBVR Substitution Conclusion The TLV431ACDBVR can serve as a replacement for the LMV431ACM5/NOPB, subject to a critical limitation: both are TI precision adjustable shunt voltage references sharing identical reference voltage (1.24V), output current (15mA), tolerance (±1%), and package (SOT-23-5). The primary distinction lies in the maximum output voltage—the TLV431 supports up to 6V, whereas the LMV431 can handle up to 30V. If the original circuit design may subject the reference voltage or cathode-anode voltage to levels exceeding 6V (e.g., in high-side biasing or wide input voltage range applications), the TLV431 cannot be directly substituted, as it risks overvoltage damage or functional failure. Conversely, in low-voltage applications (such as 3.3V or 5V systems), the two devices are fully compatible, with the TLV431 generally offering better cost-effectiveness and ease of use. It is recommended to thoroughly verify the actual operating voltage range before proceeding with the substitution.