1. LMV321SEG-7 Substitution Conclusion The LMV321SEG-7 can serve as a substitute for the LMV301SQ3T2G, but final compatibility must be assessed based on the specific application. Both devices share the same package (SOT-353) and key parameters (rail-to-rail output, 1MHz bandwidth, 1V/µs slew rate). However, three critical differences exist: First, there is a significant disparity in input bias current (15nA vs. 1nA). The LMV321SEG-7 may introduce greater error in circuits with high-impedance signal sources or in precision integrator applications. Second, the lower supply voltage limits differ (2.7V vs. 1.8V). The LMV321SEG-7 cannot support low-voltage applications in the 1.8V to 2.7V range. Third, there are differences in quiescent current and output drive capability (110µA / 90mA vs. 200µA / 160mA). The former offers lower power consumption but weaker drive strength, while the latter is better suited for driving heavier loads. Substitution is viable if the application operates above 2.7V, is not sensitive to input bias current, and requires a load current ≤90mA. Otherwise, system performance must be re-validated.