The invention provides a data driver and a semiconductor device that suppresses distortion or delay. The device is provided with a differential stage for differentially receiving an input signal and asignal of a first node; a first output stage connected between a high-order power supply terminal and a middle-order power supply terminal and having the output terminal connected to the first node;a second output stage connected between the upper power supply terminal and the middle power supply terminal and having an output terminal connected to a load via a second node; a third output stage connected between a median power supply terminal and a lower power supply terminal and having an output terminal connected to a first node; a fourth output stage connected between a median power supplyterminal and a lower power supply terminal and having an output terminal connected to a load via a second node; and a control circuit, including an output control switch for switching between a connected and disconnected state of the first and second nodes, and a plurality of switching switches for switching between the output pair of the differential stage and each of the first and second inputsof the first to fourth output stages to be connected or disconnected, and controlling the first to fourth output stages to be in an active or inactive state.