4-Bit Binary Full Adder IC, F Logic, Bipolar, 16-Pin PDIP
Commercial Logic IC, Dual 4-Bit Bus Driver, 5V, 20-Pin DIP
F/FAST SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, PDIP20, 738-03
Bus Transceiver, F/FAST Series, 1-Func, 4-Bit, Inverted Output, TTL, PDIP14, 646-06