Analog switches immune to power sequence

A method for driving an input signal as an output signal comprising:

• receiving, by output circuitry of a switch, an inverted value of an enable signal on a gate terminal of an output p-type device, to a power supply signal having a logic high level;
• receiving, by the output circuitry, a value equal to that of the enable signal on the gate terminal of the output p-type device, responsive to both the enable signal and the power supply signal having the logic low level;
• receiving, by the output circuitry, the power supply signal on a body terminal of the output p-type device;
• receiving, by control circuitry of the switch, the power supply signal;
• and
• in response to determining the power supply signal has the logic low level, prevent driving, by the control circuitry, a logic high level or a logic low level on a source terminal of the output p-type device.

An interface comprising:

• a plurality of switches;
• input logic configured to receive data from one or more of the plurality of switches;
• and
• wherein at least a given switch of the plurality of switches is configured to:
• receive a power supply signal;
• receive an inverted value of an enable signal on a gate terminal of an output p-type device, responsive to the power supply signal having a logic high level;
• receive a value equal to that of the enable signal on the gate terminal of the output p-type device, responsive to both the enable signal and the power supply signal having the logic low level;
• receive the power supply signal on a body terminal of the output p-type device;
• and
• in response to determining the power supply signal has the logic low level, prevent driving a logic high level or a logic low level on a source terminal of the output p-type device.