CD74HC161EE4 [Texas Instruments]

Presettable synchronous counters with look-ahead carry logic for high-speed counting. The HC161 and HCT161 are asynchronous reset counters (decade and binary respectively), while HC163 and HCT163 are synchronous reset counters. They feature two count enable inputs (PE and TE) for n-bit cascading, synchronous counting and loading, and balanced propagation delays. HC types operate from 2V to 6V with high noise immunity; HCT types from 4.5V to 5.5V with direct LSTTL input compatibility. Fanout of 10 LSTTL loads (standard) or 15 (bus driver). Wide operating temperature range -55°C to 125°C.