NXP Semiconductors.
8-input multiplexer; 3-state
Philips Electronics
Hex inverting Schmitt trigger
Philips Electronics
Quad 2-input NOR gate
NXP Semiconductors.
Dual 4-bit binary ripple counter
Philips Electronics
4-bit magnitude comparator
Philips Electronics
Octal D-type flip-flop; positive edge-trigger; 3-state