Original Part
Alternative Part
1. MC74HCT04ADTR2G Substitution Conclusion
The MC74HCT04ADTR2G is a viable substitute for the original MM74HCT04MTC, as it is from the same manufacturer (onsemi), shares the same package (14-TSSOP), and maintains compatibility in key parameters. Differences include: a reduction in quiescent current from 2 µA to 1 µA, resulting in lower power consumption—beneficial for low-power applications; a slight decrease in output drive current from 4.8 mA to 4 mA, which may marginally affect heavy-load driving capability but is generally sufficient for standard logic-level applications; and a shorter maximum propagation delay, improved from 20 ns to 17 ns (both tested at 5 V, 50 pF), offering faster switching speed advantageous in high-speed circuits. Overall, these differences represent improvements or are acceptable, making this part a drop-in replacement. However, design verification should confirm that the output current meets load requirements.
2. SN74HCT04PW Substitution Conclusion
The SN74HCT04PW is a feasible substitute for the original MM74HCT04MTC. Although the manufacturer differs (Texas Instruments), the package is identical (14-TSSOP) and electrical parameters are largely compatible. Key variations include: quiescent current remains at 2 µA, matching the original; output drive current is slightly reduced from 4.8 mA to 4 mA, which may marginally lower drive capability but is typically negligible in most logic circuits; and maximum propagation delay is shortened from 20 ns to 18 ns (tested at 5.5 V, 50 pF, compared to the original’s 5 V condition), indicating a slight performance improvement. Note that the different test voltage may cause minor variations in actual propagation delay. Overall, these differences are minor, and the device can be used as a direct replacement. It is recommended, however, to perform circuit-level testing after substitution, especially for high-speed or high-load applications, to ensure full compatibility.
Analysis ID: 0CE2-1292000
Based on part parameters and for reference only. Not to be used for procurement or production.
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