PCF8533 datasheet(3/36 Pages) PHILIPS

3 / 36 page

1999 Jul 30

Philips Semiconductors

Product speciﬁcation

Universal LCD driver for low multiplex rates

PCF8533

FEATURES

• Single-chip LCD controller/driver

• Selectable backplane drive configuration: static or 2/3/4

backplane multiplexing

• Selectable display bias configuration: static, 1⁄2 or 1⁄3

• Internal LCD bias generation with voltage-follower

buffers

• 80 segment drives: up to forty 8-segment numeric

characters; up to twentyone 15-segment alphanumeric

characters; or any graphics of up to 320 elements

• 80 × 4-bit RAM for display data storage

• Auto-incremented display data loading across device

subaddress boundaries

• Display memory bank switching in static and duplex

drive modes

• Versatile blinking modes

• LCD and logic supplies may be separated

• Wide power supply range: from 1.8 to 5.5 V

• Wide LCD supply range: from 2.5 V for low threshold

LCDs and up to 6.5 V for guest-host LCDs and high

threshold (automobile) twisted nematic LCDs

• Low power consumption

• 400 kHz I2C-bus interface

• TTL/CMOS compatible

• Compatible with 4-bit, 8-bit or 16-bit

microprocessors/microcontrollers

• May be cascaded for large LCD applications (up to

5120 segments possible)

• No external components

• Compatible with Chip-On-Glass (COG) technology

• Manufactured in silicon gate CMOS process.

GENERAL DESCRIPTION

The PCF8533 is a peripheral device which interfaces to

almost any Liquid Crystal Display (LCD) with low multiplex

rates. It generates the drive signals for any static or

multiplexed LCD containing up to four backplanes and up

to 80 segments and can easily be cascaded for larger LCD

applications. The PCF8533 is compatible with most

microprocessors/microcontrollers and communicates via a

two-line bidirectional I2C-bus. Communication overheads

are minimized by a display RAM with auto-incremented

addressing, by hardware subaddressing and by display

memory switching (static and duplex drive modes).

ORDERING INFORMATION

TYPE NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

PCF8533U

−

chip with bumps in tray

−

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