The 74HC74 is identical in pinout to the LS74. The device inputs are compatible with standard CMOS outputs with pullup resistors, they are compatible with LSTTL outputs. This device consists of two D flip flops with individual Set, Reset,and Clock inputs. Information at a D input is transferred to the corresponding Q output on the next positive going edge of the clock input. Both Q and Q outputs are available from each flip flop. The Set and Reset inputs are asynchronous.