A semiconductor device includes a first signal delay block configured to delay a first edge of an input signal with varying delay amounts, maintain a second edge of the input signal, and output at least one first driving signal, a second signal delay block configured to delay the second edge of the input signal with the varying delay amounts, maintain the first edge of the input signal, and output at least one second driving signal, and an output pad driving block configured to drive a data output pad with a first voltage in response to the first driving signal and drive the data output pad with a second voltage in response to the second driving signal.