US Patent 7826303 Data output circuit having shared data output control unit

A data output circuit is provided which is capable of reducing a size and current consumption by commonly using a data output control unit for a plurality of data output units. The data output circuit includes a data output control unit for receiving an external clock signal and generate clock pulses having a pulse width, a first data output unit for outputting first data in synchronization with the clock pulse, and a second data output unit for outputting second data in synchronization with the clock pulses.