74HC/HCT04 is a high-speed silicon gate CMOS device and compatible with low-power Schottky TTL (LSTTL) non-gate (inverter). The input of the inverter is high, bai output is low du level, and input is low Level, the output is high level. The typical values of its main electrical characteristics are as follows: Model tPLH tPHL: PD 5404/7404 12ns 8ns 60mW, 54H04/74H04 6ns 6.5ns 140mW, 54S04/74S04 3ns 3ns 113mW. In the limit value, the power supply voltage: 7V.