Abstract: A data output buffer is disclosed that includes an input section receiving a data signal and an output enable signal to output a pull-up signal and a pull-down signal, a drive control section and a plurality of output driving sections. The drive control section activates less than all of the plurality of drive control signals in response to the data signal in a second mode and activates all the drive control signals in normal operations or a first mode. The plurality of output driving sections each receive the pull-up signal, the pull-down signal and one of the drive control signals to perform a pull-up operation or pull-down operation in accordance with the logic value of the data signal when activated.