PCF8579 查看數據表（PDF） - Philips Electronics
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PCF8579 Datasheet PDF : 40 Pages
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Philips Semiconductors
LCD column driver for dot matrix graphic
displays
Product specification
PCF8579
1 FEATURES
• LCD column driver
• Used in conjunction with the PCF8578, this device forms
part of a chip set capable of driving up to 40960 dots
• 40 column outputs
• Selectable multiplex rates; 1 : 8, 1 : 16, 1 : 24 or 1 : 32
• Externally selectable bias configuration, 5 or 6 levels
• Easily cascadable for large applications (up to
32 devices)
• 1280-bit RAM for display data storage
• Display memory bank switching
• Auto-incremented data loading across hardware
subaddress boundaries (with PCF8578)
• Power-on reset blanks display
• Logic voltage supply range 2.5 to 6 V
• Maximum LCD supply voltage 9 V
• Low power consumption
• I2C-bus interface
• TTL/CMOS compatible
• Compatible with most microcontrollers
• Optimized pinning for single plane wiring in multiple
device applications (with PCF8578)
• Space saving 56-lead plastic mini-pack and 64-pin
plastic low profile quad flat package
• Compatible with chip-on-glass technology
• I2C-bus address: 011110 SA0.
2 APPLICATIONS
• Automotive information systems
• Telecommunication systems
• Point-of-sale terminals
• Computer terminals
• Instrumentation.
3 GENERAL DESCRIPTION
The PCF8579 is a low power CMOS LCD column driver,
designed to drive dot matrix graphic displays at multiplex
rates of 1 : 8, 1 : 16, 1 : 24 or 1 : 32. The device has
40 outputs and can drive 32 × 40 dots in a 32 row
multiplexed LCD. Up to 16 PCF8579s can be cascaded
and up to 32 devices may be used on the same I2C-bus
(using the two slave addresses). The device is optimized
for use with the PCF8578 LCD row/column driver.
Together these two devices form a general purpose LCD
dot matrix driver chip set, capable of driving displays of up
to 40960 dots. The PCF8579 is compatible with most
microcontrollers and communicates via a two-line
bidirectional bus (I2C-bus). To allow partial VDD shutdown
the ESD protection system of the SCL and SDA pins does
not use a diode connected to VDD. Communication
overheads are minimized by a display RAM with
auto-incremented addressing and display bank switching.
4 ORDERING INFORMATION
TYPE
NUMBER
PCF8579T
PCF8579U7
PCF8579H
NAME
VSO56
−
LQFP64
PACKAGE
DESCRIPTION
plastic very small outline package; 56 leads
chip with bumps on tape
plastic low profile quad flat package; 64 leads; body 10 × 10 × 1.4 mm
VERSION
SOT190
−
SOT314-2
1997 Apr 01
3
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