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Sitronix Technology

ST7541 Datasheet Preview

ST7541 Datasheet

4 Gray Scale Dot Matrix LCD Controller/Driver

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ST
Sitronix
ST7541
INTRODUCTION
4 Gray Scale Dot Matrix LCD Controller/Driver
The ST7541 is a driver & controller LSI for 4-level gray scale graphic dot-matrix liquid crystal display systems. This chip is
connected directly to a microprocessor, accepts Serial Peripheral Interface (SPI),IIC or 8-bit parallel display data and
stores in an on-chip display data RAM of 128 x 129 x 2 bits. It performs display data RAM read/write operation with no
external operating clock to minimize power consumption. In addition, because it contains power supply circuits necessary
to drive liquid crystal, it is possible to make a display system with the fewest components.
FEATURES
4-level (White, Light Gray, Dark Gray, Dark) Gray Scale Display with PWM and FRC Methods
DDRAM data [ 2n : 2n+1 ]
2n 2n + 1
Gray Scale
00
White
01
Light gray
10
Dark gray
11
Dark
(Accessible column address, n = 0, 1, 2, ……, 125, 126, 127)
Driver Output Circuits
On-chip Low Power Analog Circuit
128 segment outputs / 128+1 common outputs
Applicable Duty Ratios
Various partial display
Partial window moving & data scrolling
On-chip Display Data RAM
Capacity: 128 129 2= 33,024 bits
Microprocessor Interface
8-bit parallel bi-directional interface with 6800-series or
8080-series
4-line serial interface (4-line-SIF)
3-line serial interface (3-line-SIF)
IIC serial interface
On-chip oscillator circuit
Voltage converter (x3, x4, x5 or x6)
Voltage regulator (temperature coefficient: -0.144%/°C,
or external input)
On-chip electronic contrast control function
(64 steps X 8)
Voltage follower (LCD bias : 1/5 to 1/12)
Operating Voltage Range
Supply voltage (VDD): 1.8 to 3.3V
LCD driving voltage (VLCD = V0 - VSS): 4.0 to 15.0 V
Package Type
Application for COG
ST7541
6800 , 8080 ,
4-Line , 3-Line interface
(without IIC interface)
ST7541i
IIC interface
Ver 1.1
1/82 2004/3/12




Sitronix Technology

ST7541 Datasheet Preview

ST7541 Datasheet

4 Gray Scale Dot Matrix LCD Controller/Driver

No Preview Available !

ST7541
ST7541 Pad Arrangement (COG)
Chip Size: 12,575 um × 1,220 um
Bump Pitch:
PAD NO 1 ~ 229, 353 ~ 385: 55 um (COM/SEG), PAD NO 230 ~ 352: 75 um (I/O) [ PAD 338 – 339 : 81um]
PAD NO 229 ~ 230: 84 um, PAD NO 352 ~ 353: 913 um
Bump Size:
PAD NO 1 ~ 196, 218 ~ 229, 353 ~ 364 : 35(x) um 96(y) um PAD NO 197 ~ 217, 365 ~ 385 : 96(x) um 35(y) um
PAD NO 230 ~ 352 : 55(x)um 60(y) um
Bump Height: 18 um (Typ)
Chip Thickness: 635 um
Ver 1.1
2/82 2004/3/12


Part Number ST7541
Description 4 Gray Scale Dot Matrix LCD Controller/Driver
Maker Sitronix Technology
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