Philips Semiconductors
Universal LCD driver for low multiplex rates
Product specification
PCF8533
1 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.
2 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).
3 ORDERING INFORMATION
TYPE NUMBER
PCF8533U
NAME
−
chip with bumps in tray
PACKAGE
DESCRIPTION
VERSION
−
1999 Jul 30
3