Original Part
Alternative Part
1. SN74HCT04PW Substitution Conclusion
From the perspectives of electrical performance, logic functionality, and physical package, the SN74HCT04PW can fully replace the original part 74HCT04PW,112. Their core parameters are identical, including supply voltage (4.5–5.5V), input logic thresholds (Low: 0.8V, High: 2V), output drive capability (4mA), and quiescent current (2µA). The only difference lies in the test conditions for maximum propagation delay: the original part is specified as 19ns @ 4.5V, whereas the TI part is specified as 18ns @ 5.5V. The TI device shows slightly faster performance at its nominal maximum operating voltage, while the original part is rated at its minimum voltage. In typical 5V applications, the actual delay performance of both devices is comparable, with the TI part potentially holding a slight edge. Both devices are housed in a 14-TSSOP package and are pin-compatible. This substitution is technically and physically feasible. It is recommended to verify the replacement in the actual circuit before implementation.
2. SN74HCT04PWT Substitution Conclusion
The SN74HCT04PWT is identical to the SN74HCT04PW in electrical parameters and package. Therefore, its feasibility for replacing the original part 74HCT04PW,112 aligns with the conclusion for the SN74HCT04PW. The key technical difference between the TI parts and the original part remains the test condition for maximum propagation delay (TI: 18ns @ 5.5V, Original: 19ns @ 4.5V). Under equivalent conditions, the TI device’s performance is likely to be equal or slightly better. The suffix "T" typically denotes a difference in TI’s tape-and-reel packaging specifications (e.g., reel orientation or quantity) and does not affect the device’s electrical characteristics or pinout. The SN74HCT04PWT can serve as a direct, drop-in replacement for the original part, being fully compatible in function, performance, and mechanical mounting. Final verification in the actual application is similarly recommended.
Analysis ID: F23F-2C15000
Based on part parameters and for reference only. Not to be used for procurement or production.
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