1. LMV721M5X/NOPB Substitution Conclusion The LMV721M5X/NOPB can serve as a direct replacement for the LMV721IDCKT, as both devices share identical key electrical parameters—including gain bandwidth product (10 MHz), slew rate (5.25 V/µs), input bias current (260 nA), and supply current (1.03 mA)—ensuring equivalent performance under the same operating conditions. Two differences exist: first, the maximum supply voltage range (5.5 V for the LMV721M5X/NOPB versus 5 V for the original part) provides wider voltage tolerance, making it suitable for applications with more relaxed or slightly higher supply requirements, without compromising compatibility in 5 V or lower systems. Second, the package differs (SOT-23-5 vs. SC-70-5), meaning the substitute has a larger physical footprint and pad layout, which may preclude drop-in replacement and could require PCB layout redesign to accommodate the package change. Provided the electrical performance is acceptable and the package modification is feasible, the substitution is viable.