The LS160A/161A/162A/163A are high-speed 4-bit synchronous counters. They are edge-triggered, synchronously presettable, and cascadable MSIbuilding blocks for counting, memory addressing,frequency division and otherapplications. The LS160Aand LS162A count modulo 10 (BCD). The LS161A and LS163A count modulo 16 (binary.)

TheLS160A and LS161A have an asynchronous Master Reset (Clear) inputthat overrides, and is independent of, the clock and all other control inputs.The LS162A and LS163A have a Synchronous Reset (Clear) input that overridesall other control inputs, but is activeonly during the rising clock edge.

74LS163, 74LS16374LS160A, 74LS161A, 74LS162A, 74LS163A