Seiko Epson developed the S1D19501 series of driver ICs for 176 x 220-dot TFT LCDs. The series is a line-up of one-chip drivers for driving amorphous Si-TFT LCDs embedded with display data RAM (176 x 220 x 18 bit) and capable of displaying 18bit color depth. By embedding a 220-output gate driver and 176 (RGB)-output source driver, as well as the power circuits needed for display onto one chip, it has become possible for a single chip to display a TFT color panel module of a maximum of 176 (RBG) x 220 dots. S1D19105 series (176 x 220 x 18 bit) fabricated using the 0.25 µm process and the S1D19121 series (176 x 220 x 18 bit) using the 0.18 µm process. As the S1D19501 inherits basic specifications and commands of the existing Epson TFT drivers, smooth replacement is ensured. The short side of the chip has been reduced to approximately 1mm. The chip is equipped with programmable non-volatile memory (Multi Time PROM) for VCOM adjustment