Patent ID: 8305719

Claim:
An electrostatic discharge (ESD) protection device comprising: at least one gate coupled NMOS (GCNMOS) having a gate connected to a drain via a capacitor disposed between the gate and the drain and connected to a source and a well pick-up via a resistor; and a plurality of devices for low or medium voltage operation of 6V or less connected in series to the gate coupled NMOS (GCNMOS); wherein the plurality of devices for low or medium voltage operation are at least one of gate grounded NMOS (GGNMOS) devices, gate grounded PMOS (GGPMOS) devices, and diodes; wherein a kind and a number of the plurality of devices for low or medium voltage operation is selected to satisfy the following equation: Vtr ( Op )> Vop,Vtr ( ESD )< Vccb,Vh (Tot)< Vop+ΔV,V (2 A,Tot)< Vccb , where Vtr ( Op ) is an overall triggering voltage during normal operation, Vtr(ESD) is an overall triggering voltage upon inflow of electrostatic current, Vh(Tot) is an overall snapback holding voltage, and V(2 A,Tot) is an overall operating voltage upon inflow of a current of 2 A.