74 series logic, Transistor–transistor logic, CMOS HC, AC, CMOS Input NOR Gate - tatanh1983/conchodom GitHub Wiki 74HC Series 6 V 3-State Surface Mount Shift Register - SOIC-16 https://www.futureelectronics.com/p/semiconductors--logic--74-series--a-hc-t/74hc595d-118-nexperia-7372972