Patent ID: 7279932

Claim:
A semiconductor integrated circuit device, comprising: an electrically rewritable non-volatile memory element which operates with a first power supply and includes a gate oxide film having a first thickness a second circuit which operates with a second power supply having a voltage lower than a voltage of the first power supply and includes a gate oxide film having a second thickness which is thinner than the first thickness of the gate oxide film; and a depletion NMOS transistor which has a drain connected with an output terminal of the electrically rewritable non-volatile memory element, a source connected with an input terminal of the second circuit, a gate connected with the second power supply, and a gate oxide film having a thickness equal to the thickness of the electrically rewritable non-volatile memory element, and which transmits a signal from the output terminal of the electrically rewritable non-volatile memory element to the input terminal of the second circuit.