Patent ID: 7403047

Claim:
A system for controlling an input/output driver, the system comprising: a control system configured to receive a first supply voltage and a second supply voltage and generate a control signal; a first transistor including a first gate, a first terminal, and a second terminal, the first gate configured to receive the control signal, the first terminal configured to receive the first supply voltage; a second transistor including a second gate, a third terminal, and a fourth terminal, the second gate coupled to the second terminal; a third transistor including a third gate, a fifth terminal, and a sixth terminal, the third gate configured to receive the control signal; wherein: the first supply voltage can be equal to at least a first voltage level or a second voltage level, the second voltage level being higher than the first voltage level; the second supply voltage can be equal to at least a third voltage level or a fourth voltage level, the fourth voltage level being higher than the third voltage level; the control signal is indicative of a control state when the first supply voltage is equal to the second voltage level and the second supply voltage is equal to the third voltage level; when the control signal is indicative of the control state, the second transistor and the third transistor are turned off.