The 74AC175/74ACT175 (AC/ACT175) is a high-speed quad D-type flip-flop.

The device is useful for general flip-flop requirements where clock and clear inputs are common. The information on the D-type inputs is stored during the LOW-to HIGH clock transition. Both true and complemented outputs of each flip-flop are provided. A Master Reset input resets all flip-flops, independent of the Clock or D-type inputs, when LOW.