Philips Semiconductors
Product specification
Universal LCD driver for low multiplex
rates
PCF8576
• Compatible with any 4-bit, 8-bit or 16-bit
1
FEATURES
microprocessors/microcontrollers
• Single-chip LCD controller/driver
• May be cascaded for large LCD applications (up to
2560 segments possible)
• Selectable backplane drive configuration: static or 2/3/4
backplane multiplexing
• Selectable display bias configuration: static, 1⁄2 or 1⁄3
• Cascadable with 24-segment LCD driver PCF8566
• Optimized pinning for plane wiring in both single and
multiple PCF8576 applications
• Internal LCD bias generation with voltage-follower
buffers
• Space-saving 56-lead plastic very small outline package
(VSO56)
• 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
• Very low external component count (at most one
resistor, even in multiple device applications)
• 40 × 4-bit RAM for display data storage
• Compatible with chip-on-glass technology
• Manufactured in silicon gate CMOS process.
• Auto-incremented display data loading across device
subaddress boundaries
• Display memory bank switching in static and duplex
drive modes
2
GENERAL DESCRIPTION
• Versatile blinking modes
The PCF8576 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 PCF8576 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).
• LCD and logic supplies may be separated
• Wide power supply range: from 2 V for low-threshold
LCDs and up to 9 V for guest-host LCDs and
high-threshold (automobile) twisted nematic LCDs
• Low power consumption
• Power-saving mode for extremely low power
consumption in battery-operated and telephone
applications
• I2C-bus interface
• TTL/CMOS compatible
3
ORDERING INFORMATION
PACKAGE
TYPE NUMBER
NAME
DESCRIPTION
VERSION
PCF8576T
VSO56
plastic very small outline package; 56 leads
chip in tray
SOT190-1
PCF8576U
−
−
−
−
−
−
−
−
PCF8576U/2
PCF8576U/5
PCF8576U/7
PCF8576U/10
PCF8576U/12
chip with bumps in tray
−
unsawn wafer
−
chip with bumps on tape
FFC
FFC
chip on film frame carrier (FFC)
chip with bumps on film frame carrier (FFC)
1998 Feb 06
3
NXP [ NXP ]
