An ESD protection circuit is provided for protecting an integrated circuit from ESD damage and for protecting lightening surge. The ESD protection circuit includes a first snapback device and a second snapback device. The first snapback device is connected to a first terminal having a negative voltage of the integrated circuit during the operation of the integrated circuit. The first snapback device includes an anode coupled to the first terminal of the integrated circuit. The cathode of the first snapback device is coupled to a VCC terminal of the integrated circuit. The second snapback device has a cathode coupled to the VCC terminal. The anode of the second snapback device is connected to the ground of the integrated circuit. The snapback devices operate as silicon-controlled rectifiers (SCR) to protect the integrated circuit.

Ta-Yung Yang

Papers

Esd protection circuit for an integrated circuit with a negative voltage input terminal