The SN74LS164N is a 8-bit serial-in, parallel-out shift register from Texas Instruments. It is used in digital logic applications and features low power operation and uses advanced Schottky TTL technology. It also has a serial output (Q7') which enables cascading stages together. The SN74LS164N operates with voltage levels of 5V, 4.2V, 3.6V, 3V, and 2.7V, making it suitable for a wide range of applications. The data input of this device is referred to as D, the shift/load input is referred to as SR, and the clock input is referred to as CP. The SN74LS164N is fast and has a low power dissipation rating of 19uA.