74HC4040 12-bit binary Counter
12 stage binary counter. Each counter stage is a static toggle flip-flop. The 74HC4040, 74HCT4040 are high-speed CMOS devices and are pin compatible with the 4040 series. The counter advances on the High to Low transition of the clock-pulse A HIGH on MR pin clears all counter stages and forces all outputs LOW, independent of the state of CP.