The SN74ALS175DR is a high-speed 4-bit D-type flip flop from Texas Instruments. It is a dual-supply quad D-type flip-flop with a common data latch and an output enable, and it is designed to work with either 5V or 3V supply voltage. This device is ideal for use as a control, storage, or data transmission device. It has various control inputs and an asynchronous reset, and it also provides fast setup and hold times with minimal clock to output skew. This device is available in standard SOIC and TSSOP packages.