Electrostatic discharge (ESD) protection circuitry in an integrated circuit is provided. The protection circuitry includes a trigger circuit coupled between a first power supply bus and a second power supply bus. A delay circuit is coupled to receive an output signal from the trigger circuit. The delay circuit includes a first inverter coupled to the input of the delay circuit and a feedback transistor having a control terminal coupled to the output of the delay circuit, a first current electrode coupled to the first power supply bus, and a second current electrode coupled to the output of the first inverter. A clamp driver circuit is coupled to the output of the delay circuit.