The ML9090-01 and ML9090-02 are LCD drivers that contain internal RAM and a key scan function. They are best suited for car audio displays. Since 1-bit data of the display RAM corresponds to the light-on or light-off of 1-dot of the LCD panel (a bit map system), a flexible display is possible. A single chip can implement a graphic display system of a maximum of 80 16 dots (80 8 dots for the ML9090-01, 80 16 dots for the ML9090-02) and an arbitrator display system of 80 2 dots. Since containing voltage multipliers, the ML9090-01 and ML9090-02 require no power supply circuit to drive the LCD.