Esd circuit with esd rail discharge circuitry

A semiconductor die, comprising:

• a plurality of supply voltage die terminals, each supply voltage die terminal of the plurality of supply voltage die terminals is configured to supply a supply voltage to a respective voltage domain of a plurality of voltage domains of the semiconductor die;
• electrostatic discharge (ESD) circuity including:
• a first ESD rail, each supply voltage die terminal of the plurality of supply voltage die terminals is coupled to the first ESD rail;
• a discharge circuit including a discharge path between first ESD rail and a lower supply voltage rail for carrying current between the first ESD rail and the lower supply voltage rail, the discharge circuit including a plurality of transistors located in series in the discharge path, wherein each transistor of the plurality of transistors is located in the discharge path to control the flow of current through the discharge path, wherein each transistor of the plurality of transistors includes a control terminal that is coupled to a respective supply voltage die terminal of the plurality of supply voltage die terminals.