The MM54HC160 MM74HC160 MM54HC161 MM74HC161 MM54HC162 MM74HC162 and MM54HC163 MM74HC163 synchronous presettable counters utilize advanced silicon-gate CMOS technology and internal look-ahead carry logic for use in high speed counting applications They offer the high noise immunity and low power consumption inherent to CMOS with speeds similar to low power Schottky TTL The 'HC160 and the 'HC162 are 4 bit decade counters and the 'HC161 and the 'HC163 are 4 bit binary counters All flip-flops are clocked simultaneously on the low to high transition (positive edge) of the CLOCK input waveform