4-Bit Up Binary Counter, Dual, Negative Edge Triggered, 79MHz, 5V, DIP
74HC623B1R 8-Bit Inverting Transceiver, 3-STATE, 20-Pin DIP
HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, PDIP16, PLASTIC, DIP-16
