1. MM74HCT04MTC Substitution Conclusion After a detailed comparison, the MM74HCT04MTC can be used as a full drop-in replacement for the original part 74HCT04PW,112. The core parameters of the two devices are highly consistent: supply voltage, logic family, number of channels, input level thresholds, and package type are identical, ensuring basic logical functionality and physical compatibility. Two minor differences were identified. First, the output drive current of the MM74HCT04MTC (4.8mA) is slightly higher than that of the original part (4mA), giving it marginally stronger load-driving capability, which is a beneficial factor in practical applications. Second, its maximum propagation delay (20ns @ 5V) shows an increase of approximately 1ns compared to the original's specification (19ns @ 4.5V). Given the different test conditions (voltage) and the extremely small magnitude of the difference, this parameter shift is highly unlikely to cause any perceptible negative impact on signal speed in typical 5V system applications. In summary, this part is a qualified substitute offering pin-to-pin compatibility, functional equivalence, and well-matched electrical characteristics.