Electronic device for overvoltage protection

An overvoltage protection circuit for applying a protection voltage to a receiver operating based on a power source voltage and a pad voltage applied from a pad,

• the overvoltage protection circuit comprising:
• a reference voltage generator configured to generate a reference voltage when the power source voltage is in an on state;
• and
• a voltage detector configured to generate and apply the protection voltage to the receiver based on the reference voltage when the power source voltage is in the on state, and generate and apply the protection voltage to the receiver based on the pad voltage when the power source voltage is in an off state.

An electronic device comprising:

• a receiver configured to operate based on a power source voltage and a pad voltage applied from a pad, the receiver comprising at least one transistor to which the pad voltage is applied;
• and
• an overvoltage protection circuit configured to apply a protection voltage to the receiver,
• wherein the overvoltage protection circuit comprises:
• a reference voltage generator configured to generate a reference voltage when the power source voltage is in an on state;
• and
• a voltage detector configured to generate and apply the protection voltage to the receiver based on the pad voltage when the power source voltage is in the on state, and generate and apply the protection voltage to the receiver based on the pad voltage when the power source voltage is in an off state.