The PD16664 is a column (segment) driver with internal RAM and can drive a full-dot LCD. Equipped with 144/160/184/208-output pins and a display RAM of 208 x 160 x 2 bits, this driver can display any of four gray levels selected from a 25-level palette. By using this IC in combination with the PD16667, 144 x 128 pixels to 416 x 320 pixels can be displayed.