Patent ID: 8634173

Claim:
A semiconductor apparatus comprising: a first power supply terminal and a second power supply terminal; an internal circuit connected between the first power supply terminal and the second power supply terminal; and a protection circuit connected in parallel with the internal circuit between the first power supply terminal and the second power supply terminal, the protection circuit including: a series circuit including a resistor and a first capacitor connected in series, the series circuit connected in parallel with the internal circuit between the first power supply terminal and the second power supply terminal; a first MOS transistor connected in parallel with the series circuit, the first MOS transistor configured to be controlled in accordance with a voltage at a connection point between the resistor and the first capacitor; and a switch circuit connected in parallel with the resistor, the switch circuit configured to be turned on in a delayed manner after a power supply voltage is applied between the first power supply terminal and the second power supply terminal and to change the voltage at the connection point so that the first MOS transistor is turned off.