Integrated circuit device that selects its own supply voltage by controlling a power supply

An integrated circuit device for use with a programmable power supply providing a supply voltage to the integrated circuit device according to at least one voltage control signal, the integrated circuit device comprising:

• a temperature sensing circuit providing a temperature signal which corresponds to a current temperature of the integrated circuit device;
• a voltage map circuit coupled to the temperature sensing circuit, the voltage mad circuit storing a plurality of values representing operational voltages predetermined for a corresponding plurality of temperature ranges of the integrated circuit device, the voltage mad circuit providing an output value in response to the temperature signal, wherein the output value represents an operational voltage appropriate for the current temperature of the integrated circuit device;
• and
• a voltage control circuit coupled to the voltage map circuit, the voltage control circuit generating the at least one voltage control signal in response to the output value such that the supply voltage is substantially equal to the operational voltage.