The SN74LS163N are 4-bit synchronous counters.They are edge-triggered, synchronously presettable, and cascadable MSI building blocks for counting, memory addressing, frequency division and other applications. The SN74LS163N count modulo 16 (binary.) The SN74LS163N have a Synchronous Reset (Clear) input that overrides all other control inputs, but is active only during the rising clock edge.

?Synchronous Counting and Loading
?Two Count Enable Inputs for High Speed Synchronous Expansion
?Terminal Count Fully Decoded
?Edge-Triggered Operation
?Typical Count Rate of 35 MHz
?ESD > 3500 Volts