74HC Series Logic – Texas Instruments SN74HC02N, The Texas Instruments 74HC02N Quad 2-input NOR gate is available in a DIL-14 package. It has full function and pin compatibility with LSTTL family and most types of the CMOS-4000 family. It features very short switching times and with a fan out of 10 LSTTL loads. Texas Instruments SN74HC02N Logic Quad 2 Input NOR Gate DIP14