74HC/HCT02 功能：TTL 2输入端四NOR The 74HC/HCT02 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT02 provide the 2-input NOR function.
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