Off chip driver circuit

An off-chip driver circuit comprising:

• a first and second input node for receiving a first and second input signal respectively;
• an input transmission gate including a p-channel transistor in parallel with an n-channel transistor to receive the first input signal;
• a push-pull circuit comprising a pull-up transistor disposed between a first voltage supply and an output node and a first pull-down transistor disposed between a second voltage supply and the output node, the pull-up transistor having a gate electrode for receiving the first input signal provided by the input transmission gate, the pull-down transistor having a gate electrode for receiving the second input signal;
• a control transistor coupled between the gate electrode of the pull-up transistor and the output node and having a gate electrode connected to a first given point of reference potential;
• a feedback override circuit means coupled between the output node and a gate electrode of the p-channel transistor of the transmission gate for selectively providing to the gate electrode of the p-channel transistor a second given point of reference potential or the potential at the output node, the feedback override circuit comprising:
• a pass transistor coupled between the output node and the gate electrode of the p-channel transmission gate transistor, having a gate electrode connected to a third given point of reference potential;
• and
• at least a second pull-down transistor coupled between the gate electrode of the p-channel transmission gate transistor and the second supply voltage and having a gate electrode coupled to a control input signal;
• a p-channel transistor connected in parallel with the input transmission gate having a gate electrode coupled to the output node;
• and
• a biasing transistor, having a gate electrode directly connected to the output node, and coupled to the first voltage supply for biasing an N-well in which the pull-up transistor, control transistor and pass transistor are situated.