The SN74AHC74DR is a 2-element D-type positive-edge triggered flip-flop IC (integrated circuit) manufactured by Texas Instruments. It is a 14-pin Small Outline Integrated Circuit (SOIC) that is 0.154” (3.90mm) in width and operates over an extended temperature range from -40ºC to +85ºC. It contains two independent D-type flip-flops that have separate data, set, reset, clock, and complementary outputs. The ‘D’ input data is transferred to the Q output when the clock input is HIGH. The state of the ‘Q’ output will be retained until the next active clock transition. This IC is pin and functionally compatible with the SN74AC74 and SN74ALS74. It has a maximum supply voltage of 6.0V and a power dissipation of 836mW. The SN74AHC74DR is an ideal choice for applications requiring sequential logic such as counters, registers, multiplexers, high speed switching, and asynchronous time delays.