The semiconductor device includes a pre-signal generator and a data output portion. The pre-signal generator generates a pre-input control signal and a pre-output control signal. The pre-signal generator also generates a pre-latch pulse signal by detecting when the pre-input control signal and the pre-output control signal are generated. The data output portion receives an input control signal, a latch pulse signal, and a first output control signal. The data output portion receives an input clock signal in response to the input control signal and the latch pulse signal to generate a shift clock signal, and the data output portion also shifts the first output control signal in response to the shift clock signal to generate a second output control signal.