TLF6146

April 1990

MM58201 Multiplexed LCD Driver

General Description

The MM58201 is a monolithic CMOS LCD driver capable of

driving up to 8 backplanes and 24 segments A 192-bit RAM

stores the data for the display Serial input and output pins

are provided to interface with a controller An RC oscillator

generates the timing necessary to refresh the display The

magnitude of the driving waveforms can be adjusted with

bits of RAM allow the user to program the number of back-

planes being driven and to designate the driver as either a

master or slave for cascading purposes When two or more

drivers are cascaded the master chip drives the backplane

lines and the master and each slave chip drive 24 segment

lines Synchronizing the cascaded drivers is accomplished

by tying the RC OSC pins together and the BP1 pins togeth-

er

The MM58201 is packaged in a 40-lead dual-in-line pack-

age or 44 lead plastic chip carrier package

Features

Y

Drives up to 8 backplanes and 24 segment lines

Y

Stores data for display

Y

Cascadable

Y

Low power

Y

Fully static operation

Applications

Y

Dot matrix LCD driver

Y

Multiplexed 7-segment LCD driver

Y

Serial inSerial out memory

Block Diagram

TLF6146 – 1

FIGURE 1

C1995 National Semiconductor Corporation

RRD-B30M105Printed in U S A