SEMICONDUCTOR DEVICES WITH VOLTAGE ADJUSTMENT

A semiconductor device includes: a voltage clamping circuit including a plurality of first elements operating upon receiving a voltage having a first level and configured to output a clamp signal swinging in the first level by adjusting a voltage of an external input signal swinging in a second level more than twice the first level; a first buffer circuit configured to buffer the clamp signal; a level down shifter circuit configured to reduce the voltage of the clamp signal and output an internal input signal swinging in the first level between a predetermined reference voltage and a first power supply voltage higher than the reference voltage; and a second buffer circuit configured to buffer the internal input signal and transmits the internal input signal to a core circuit.