Patent ID: 8576526

Claim:
An electrostatic discharge (ESD) protection device for an integrated circuit (IC), comprising: a resistor-capacitor (RC) timing circuit for selectively turning on the ESD protection device during an ESD event; a trigger circuit for receiving an output of the RC timing circuit and generating a trigger pulse for driving at least one of: a first ESD clamp and a second ESD clamp; and a selection circuit for selecting one of: the trigger circuit or a charge pump for controlling the second ESD clamp, wherein the charge pump controls the second ESD clamp in an absence of the ESD event, and wherein the trigger circuit controls the second ESD clamp in response to the ESD event; the selection circuit including: a first transmission gate for connecting the trigger circuit to the second ESD clamp in response to the ESD event; and a second transmission gate for disconnecting the charge pump from the second ESD clamp in response to the ESD event.