1.74HCT04T14-13 Substitution Conclusion In the vast majority of general-purpose digital circuits, the Diodes Incorporated 74HCT04T14-13 can serve as a drop-in replacement for the onsemi MM74HCT04MTCX. However, careful evaluation is warranted for ultra-low-power or battery-powered applications due to its significantly higher static power consumption. The key differences and their implications are as follows: 1. Quiescent Current (ICC): The substitute's quiescent current (20 µA) is an order of magnitude higher than the original's (2 µA). During system standby or idle states, this results in a tenfold increase in static power dissipation, which can negatively impact battery life or the overall system power budget. 2. Output Drive Current (IO): The substitute exhibits a slight imbalance between its source current (4 mA) and sink current (5.2 mA), and a minor deviation from the original's symmetrical rating (4.8 mA for both). While driving identical loads, this may cause subtle differences in high/low-level voltage swing or drive capability. For standard CMOS/TTL loads, this discrepancy typically does not affect logical functionality. 3. Propagation Delay (tpd): The substitute's maximum delay is 22 ns (@ 4.5V), slightly higher than the original's 20 ns (@ 5V). This indicates marginally slower signal transition through the logic gate. Given the small difference (2 ns) and the different test voltage conditions (4.5V vs. 5V), this delay increase is generally negligible for non-high-speed critical paths. Core Substitution Rationale: The two devices are fully compatible in their core specifications: supply voltage, logic function, input level thresholds, and pinout/package. This ensures direct functional interchangeability. The noted differences primarily affect power consumption and marginal performance parameters. Substitution is therefore viable in applications without stringent low-power or high-speed timing requirements. Direct replacement is not recommended if the application is critically sensitive to static power draw.