Philips Semiconductors
Universal LCD driver for low multiplex
rates
Product specification
PCF8576C
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
• 40 segment drives: up to twenty 8-segment numeric
characters; up to ten 15-segment alphanumeric
characters; or any graphics of up to 160 elements
• 40 × 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 2 V for low-threshold
LCDs and up to 6 V for guest-host LCDs and
high-threshold (automobile) twisted nematic LCDs.
A 9 V version is also available on request.
• Low power consumption
• Power-saving mode for extremely low power
consumption in battery-operated and telephone
applications
• I2C-bus interface
• TTL/CMOS compatible
• Compatible with any 4-bit, 8-bit or 16-bit
microprocessors/microcontrollers
• May be cascaded for large LCD applications (up to
2560 segments possible)
• Cascadable with 24-segment LCD driver PCF8566
• Optimized pinning for plane wiring in both and multiple
PCF8576C applications
• Space-saving 56-lead plastic very small outline package
(VSO56) or 64-lead low profile quad flat package
(LQFP64)
• No external components
• Compatible with chip-on-glass technology
• Manufactured in silicon gate CMOS process.
2 GENERAL DESCRIPTION
The PCF8576C 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 40 segments and can easily be cascaded for larger LCD
applications. The PCF8576C 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
PCF8576CT
PCF8576CU
PCF8576CU/2
PCF8576CU/5
PCF8576CU/7
PCF8576CU/10
PCF8576CU/12
PCF8576CH
NAME
VSO56
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−
−
−
FFC
FFC
LQFP64
PACKAGE
DESCRIPTION
plastic very small outline package; 56 leads
chip in tray
chip with bumps in tray
unsawn wafer
chip with bumps on tape
chip-on-film frame carrier
chip with bumps on film frame carrier
plastic low profile quad flat package; 64 leads; body 10 × 10 × 1.4 mm
VERSION
SOT190-1
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−
−
−
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SOT314-2
1998 Jul 30
3