Sunplus Technology Co., Ltd.

1

Rev.: 1.0

1999.10.04

SPLC100A1

40-CHANNEL SEG/COM LCD DRIVER

GENERAL DESCRIPTION

The SPLC100A1 is a Liquid Crystal Display driver that contains two sets of 20-bit bi-directional shift registers, 20

data latch flip-flops and 20 Liquid Crystal Display drivers.

It also features 40-channel outputs that can be applied

as common or segment driver.

The SPLC100A1 receives serial display data from a display control LSI,

converts it into parallel data and supplies liquid crystal display waveforms to the liquid crystal.

FEATURES

Liquid Crystal Display driver with serial/parallel

conversion function.

Serial transfer facilitates board design.

Capable of interfacing to liquid crystal display

controllers: HD43160AH, HD61830, HD44780,

HD44790, SPLC780

40 internal LCD drivers.

Internal serial/parallel conversion circuits:

—

20-bit shift register

2

—

20-bit latch

2

Power supply:

—

Internal logic: 2.7V – 5.5V

—

Liquid crystal display driver circuit: 3.0V – 11.0V

CMOS process.

BLOCK DIAGRAM

LCD Drivers

20-bit latch

20-bit bidirectional shift register

20-bit bidirectional shift register

20-bit latch

LCD Drivers

Y1

Y20

Y21

Y40

Shift

direction

Data

SHL1

DR1

Shift

direction

Data

DR2

SHL2

Latch signal

Shift signal

Switching circuit

Data

Data

V1,V2

V3,V4

CL1

DL1

CL2

DL2

FCS

M

V1,V2

V5,V6