Semiconductor device having level shifter

Disclosed herein is a semiconductor device that includes: an internal voltage generator configured to produce an internal voltage in a first mode and stop producing the internal voltage in a second mode; a level shifter configured to receive the internal voltage, a first voltage and a first signal, in order to convert the first signal from a voltage level of internal voltage to a voltage level of the first voltage and output the first signal with the voltage level of the first voltage; and a logic circuit configured to produce the first signal, the logic circuit being supplied with the internal voltage in the first mode and supplied with the first voltage in the second mode.