Philips Semiconductors
Product specification
Universal LCD driver for low
multiplex rates
CONTENTS
1
2
3
4
5
6
6.1
6.2
6.3
6.3.1
6.4
6.4.1
6.4.2
6.4.3
6.4.4
6.5
6.5.1
6.5.2
6.6
6.7
6.8
6.9
6.10
6.11
6.12
6.13
6.14
6.15
7
7.1
7.2
7.3
FEATURES
GENERAL DESCRIPTION
ORDERING INFORMATION
BLOCK DIAGRAM
PINNING
FUNCTIONAL DESCRIPTION
Power-on reset
LCD bias generator
LCD voltage selector
LCD bias formulae
LCD drive mode waveforms
Static drive mode
1 : 2 multiplex drive mode
1 : 3 multiplex drive mode
1 : 4 multiplex drive mode
Oscillator
Internal clock
External clock
Timing
Display register
Segment outputs
Backplane outputs
Display RAM
Data pointer
Subaddress counter
Output bank selector
Input bank selector
Blinker
CHARACTERISTICS OF THE I
2
C-BUS
Bit transfer
Start and stop conditions
System configuration
7.4
7.5
7.6
7.7
7.8
7.9
7.10
8
9
10
11
12
13
14
15
16
16.1
16.2
16.3
16.4
16.5
17
18
19
20
PCF8576D
Acknowledge
PCF8576D I
2
C-bus controller
Input filters
I
2
C-bus protocol
Command decoder
Display controller
Cascaded operation
LIMITING VALUES
HANDLING
DC CHARACTERISTICS
AC CHARACTERISTICS
BONDING PAD INFORMATION
DEVICE PROTECTION
TRAY INFORMATION
PACKAGE OUTLINE
SOLDERING
Introduction to soldering surface mount
packages
Reflow soldering
Wave soldering
Manual soldering
Suitability of surface mount IC packages for
wave and reflow soldering methods
DATA SHEET STATUS
DEFINITIONS
DISCLAIMERS
PURCHASE OF PHILIPS I
2
C COMPONENTS
2004 Jun 17
2
Philips Semiconductors
Product specification
Universal LCD driver for low
multiplex rates
1
FEATURES
PCF8576D
•
Single-chip LCD controller/driver
•
Selectable backplane drive configuration: static or 2/3/4
backplane multiplexing
•
Selectable display bias configuration: static,
1
/
2
and
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-incremental display data loading across device
subaddress boundaries
•
Display memory bank switching in static and duplex
drive modes
•
Versatile blinking modes
•
Independent supplies possible for LCD and logic
voltages
•
Wide power supply range: from 1.8 to 5.5 V
•
Wide logic 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 I
2
C-bus interface
•
TTL/CMOS compatible
3
ORDERING INFORMATION
PACKAGE
TYPE NUMBER
NAME
PCF8576DH
PCF8576DT
PCF8576DU/DA
PCF8576DU/2DA
PCF8576DH/2
(1)
PCF8576DT/2
(1)
PCF8576DU/DA/2
(1)
PCF8576DU/2DA/2
(1)
Note
1. These types have improved EMC immunity.
TQFP64
TSSOP56
−
−
TQFP64
TSSOP56
−
−
DESCRIPTION
plastic thin shrink small outline package; 56 leads; body width
6.1 mm
chips in tray
chip with bumps in tray
plastic thin shrink small outline package; 56 leads; body width
6.1 mm
chips in tray
chip with bumps in tray
VERSION
SOT364-1
−
−
SOT364-1
−
−
plastic thin quad flat package; 64 leads; body 10
×
10
×
1.0 mm SOT357-1
•
Compatible with 4, 8 or 16-bit microprocessors or
microcontrollers
•
May be cascaded for large LCD applications (up to
2560 elements possible)
•
No external components
•
Compatible with chip-on-glass technology
•
Manufactured in silicon gate CMOS process.
2
GENERAL DESCRIPTION
The PCF8576D 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 PCF8576D is compatible with most
microprocessors/microcontrollers and communicates via a
two-line bidirectional I
2
C-bus. Communication overheads
are minimized by a display RAM with auto-incremental
addressing, by hardware subaddressing and by display
memory switching (static and duplex drive modes).
plastic thin quad flat package; 64 leads; body 10
×
10
×
1.0 mm SOT357-1
2004 Jun 17
3
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2004 Jun 17
handbook, full pagewidth
4
Philips Semiconductors
Universal LCD driver for low
multiplex rates
BLOCK DIAGRAM
BP0 BP2 BP1 BP3
25
26
27
28
S0 to S39
29 to 32, 34 to 47,
49 to 64, 2 to 7
DISPLAY SEGMENT OUTPUTS
VLCD
21
BACKPLANE
OUTPUTS
LCD
VOLTAGE
SELECTOR
DISPLAY
CONTROLLER
DISPLAY REGISTER
VSS
20
LCD BIAS
GENERATOR
OUTPUT BANK SELECT
AND BLINK CONTROL
4
CLK
SYNC
13
CLOCK SELECT
12
AND TIMING
BLINKER
TIMEBASE
PCF8576DH
DISPLAY
RAM
40
×
4 BIT
OSC
VDD
SCL
SDA
15
14
11
10
OSCILLATOR
POWER-ON
RESET
COMMAND
DECODER
WRITE DATA
CONTROL
DATA POINTER AND
AUTO INCREMENT
INPUT
FILTERS
I
2
C-BUS
CONTROLLER
19
SA0
1, 8, 9, 22 to 24, 33, 48
SUB-ADDRESS
COUNTER
16
A0
A1
17
A2
18
MDB075
n.c.
Product specification
PCF8576D
Fig.1 Block diagram for version PCF8576DH.
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2004 Jun 17
BP0 BP2 BP1 BP3
56
V
LCD
55
1
2
3
S0 to S39
4 to 43
BACKPLANE
OUTPUTS
DISPLAY SEGMENT OUTPUTS
LCD
VOLTAGE
SELECTOR
DISPLAY
CONTROLLER
DISPLAY REGISTER
V
SS
54
LCD BIAS
GENERATOR
OUTPUT BANK SELECT
AND BLINK CONTROL
Philips Semiconductors
Universal LCD driver for low
multiplex rates
5
CLK
SYNC
47
46
CLOCK SELECT
AND TIMING
BLINKER
TIMEBASE
PCF8576DT
DISPLAY
RAM
40
×
4 BIT
OSC
V
DD
SCL
SDA
49
48
45
44
OSCILLATOR
POWER-ON
RESET
COMMAND
DECODER
WRITE DATA
CONTROL
DATA POINTER AND
AUTO INCREMENT
INPUT
FILTERS
I
2
C-BUS
CONTROLLER
53
SA0
SUB-ADDRESS
COUNTER
50
A0
A1
51
A2
52
Product specification
001aab131
PCF8576D
Fig.2 Block diagram for version PCF8576DT.
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