1. CD74HCT04PWRG4 Substitution Conclusion From the perspective of electrical parameters and package specifications, the CD74HCT04PWRG4 can fully replace the original part 74HCT04T14-13. Both devices are 6-channel HCT-series inverters in a 14-TSSOP package, with identical key parameters including supply voltage (4.5V–5.5V), input high/low threshold voltages (0.8V/2.0V), and test conditions (4.5V, 50pF). The differences are as follows: First, regarding static power consumption, the TI part has a maximum quiescent current of 2µA, which is only one-tenth that of the original device (20µA). This substitution will significantly reduce system standby power. Second, in terms of output drive capability, the TI device provides 4mA for both high-level and low-level output currents, whereas the original part offers 5.2mA low-level output current. This indicates the substitute part has slightly weaker low-level drive capability, though it remains within the standard HCT series range and should not noticeably affect typical load logic interfaces. Third, for propagation delay, the TI part has a maximum delay of 19ns, a slight improvement over the original (22ns), which can help enhance signal response speed. In summary, while maintaining core compatibility, the substitute part offers minor improvements in power consumption and speed, making it a direct replacement suitable for most 5V HCT logic circuits.