ST

Sitronix

ST7921

96CH Segment Driver For Dot Matrix LCD

Ver 1.6

1/11

2005/05/24

Features :

Display driving bias : static to 1/5

Power supply for logic : 2.7V ~ 5.5V

3V ~ 7V

Dot matrix LCD driver with two 48 channel outputs

Bias voltage (V0 ~ V4)

Input/Output signals

Input : Serial display data and control pulse from controller IC

Output : 48 X 2 channels waveform for LCD driving

General Description :

ST7921 is a segment driver for dot matrix type LCD display. It features 96 channels

with 48 X 2 bits bi-directional shift registers, data latches, LCD drivers and logic

control circuits. It is fabricated by high voltage CMOS process with low current

consumption.

The ST7921 can convert serial data received from an LCD controller, such as ST7920,

into parallel data and send out LCD driving waveforms to the LCD panel. The

ST7921 is designed for general purpose LCD drivers. It can drive both static and

dynamic drive LCD. The LSI can be used as segment driver.