A circuit for generating a data strobe signal includes: a control signal generation unit configured to generate a strobe control signal defining an activation time period where a first data strobe signal and a second data strobe signal, which is an inverted signal of the first data strobe signal, are toggled; and a strobe signal output unit configured to output the first and second data strobe signals as a final strobe signal in the activation time period where the strobe control signal is activated.