A semiconductor device may include a first logic unit for performing a logic operation with respect to a plurality of first control signals, each of which indicates whether a corresponding one of a plurality of banks of the semiconductor device is in an active state, a refresh detector for outputting a second control signal which is enabled when at least one of the banks performs a self-refresh operation or auto-refresh operation, and a second logic unit for performing a logic operation with respect to an output signal from the first logic unit and the second control signal to generate a third control signal having information about activation of the semiconductor device. The third control signal is enabled when at least one of the banks performs the self-refresh operation or auto-refresh operation even though it is in the active state.