A driver circuit includes a memory cell for storing data and a data switching circuit. The memory cell includes a first inverter having a first output terminal and a first input terminal and a second inverter having a second output terminal and a second input terminal. The first output terminal is connected to the second input terminal and the second output terminal is connected to the first input terminal. A switch is connected to the first input terminal so that the data is fed to the memory cell through the switch. A voltage shifter supplies a first supply voltage to the first inverter and second inverter while the data is being written into the memory cell and a second supply voltage to the first inverter and second inverter after the data has been written into the memory cell.