PCF8801 datasheet(2/20 Pages) PHILIPS

2 / 20 page

2000 Feb 04

Philips Semiconductors

Product speciﬁcation

LCD driver for 140

× 2 segments

PCF8801

FEATURES

• Single-chip LCD controller/driver

• Fixed backplane multiplexing at a rate of 1 : 2

• Internal LCD bias generation (0.5VDD)

• 140 segment outputs configured to drive seven

40-segment characters

• On-chip oscillator with one external resistor

• Wide power supply range (2.7 V up to 5.5 V)

• Low power consumption

• Compatible with most microprocessors/microcontrollers

• 1 MHz serial bus interface (280-bit shift register)

• Easily cascaded for large LCD applications (two

cascade directions possible)

• Compatible with chip-on-glass technology

• Manufactured by silicon gate CMOS process.

GENERAL DESCRIPTION

The PCF8801 is a peripheral device which interfaces a

multiplexed Liquid Crystal Display (LCD) having two

backplanes and up to 140 segments. It generates drive

signals at a multiplex rate of 1 : 2 allowing seven

40-segment (5 x 8) characters to be driven.

The chip can easily be cascaded for larger LCD

applications, and the direction of the information flow in the

cascade can be selected. The PCF8801 is compatible with

most microprocessors/microcontrollers and

communicates via a serial bus interface comprising a

280-bit shift register.

The outputs are multiplexed by a clock signal generated by

the internal oscillator which needs only one external

resistor. Cascade applications only require the clock signal

to be generated by the first device with the internal

oscillators in the other devices disabled.

The PCF8801 is designed for chip-on-glass applications.

It has a narrow package with raised points (bumps) for

easy assembly on to LCD glass.

ORDERING INFORMATION

TYPE

NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

PCF8801U

−

chip with bumps in tray

−

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