SN74AC74-EP Overview
/ordering information The SN74AC74 is a dual positive-edge-triggered D-type flip-flop. A low level at the preset (PRE) or clear (CLR) input sets or resets the outputs, regardless of the levels of the other inputs. When PRE and CLR are inactive (high), data at the data (D) input meeting the setup-time requirements is transferred to the outputs on the positive-going edge of the clock pulse.