General Description

IT7020C/H feature a high-voltage common driver, which consists of 240 channels. The IT7020C/H can drive a dot matrix STN LCD panel, and has been designed specifically to meet the LCD requirement in PDA devices. It can be used in conjunction with the segment drivers: IT7010C/H or IT7012C/H.

In terms of power consumption, the device is able to reduce the required voltage level and power consumption considerably. Additionally, the built-in screen display off function supported in the device can also help to reduce the overall power consumption while the LCD panel is not actively in use. In logic portion, IT7020C/H operate with a low 3V logic drive voltage to help reducing power consumption.

The device can generate a high voltage drive of +21.5V and –21.5V through a 43V high voltage CMOS process technology. By the built-in power circuit and external capacity, the generation of –21.5V will occur from +21.5V.

In addition, users are allowed the selection of 240-, 200- and 160-channel output mode by conveniently changing the mode according to what panel resolution they have.

The device is available in two packages: 273-pin fine flex Tape-Carrier Package (TCP) (IT7020C), and 349-bump chip form package (IT7020H).

Feature

l Supports up to 1/240 display duty 

l Provides 240 LCD drive circuits 

l Provides 43V LCD drive voltage at maximum

l Provides 2.5 to 5.5V operating voltage

l Provides built-in power circuit for generating -21.5V

l Provides the intermediate voltage interface

l Built-in alternating signal generation circuit 

(programmable through the MWS0-MWS4 pins) is provided to restrain

 crosstalk

l Supports screen display off function

Data Sheet

IT7020C/H v0.4