A level shifting device is disclosed. The device includes an input unit, a control unit, a high level generating unit, a low level generating unit and an output unit. The input unit generates a level selection signal and a plurality of output selection signals by sampling serial input data. The control unit selectively generates a high level activation signal or a low level activation signal based on the input data, and generates a switching signal based on the input data. The high level generating unit generates a high level output signal in response to the high level activation signal, and the low level generating unit generates a low level output signal in response to the low level activation signal. The output unit outputs one of the high level output signal and the low level output signal to each of a plurality of output signals in response to the switching signal.