PCA8576C Datasheet PDF - NXP Semiconductors
| Part Number | PCA8576C | |
| Description | Universal LCD Driver | |
| Manufacturers | NXP Semiconductors | |
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PCA8576C
Universal LCD driver for low multiplex rates
Rev. 1 — 22 July 2010
Product data sheet
1. General description
The PCA8576C is a peripheral device which interfaces to almost any Liquid Crystal
Display (LCD)1 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 PCA8576C is compatible with most
microprocessors or microcontrollers and communicates via a two-line bidirectional
I2C-bus. Communication overheads are minimized by a display RAM with
auto-incremented addressing and by hardware subaddressing.
AEC-Q100 compliant for automotive applications.
2. Features and benefits
Single-chip LCD controller and driver
40 segment drives:
Up to twenty 7-segment alphanumeric characters
Up to ten 14-segment alphanumeric characters
Any graphics of up to 160 elements
Versatile blinking modes
No external components required (even in multiple device applications)
Selectable backplane drive configuration: static, 2, 3, or 4 backplane multiplexing
Selectable display bias configuration: static, 1⁄2, or 1⁄3
Internal LCD bias generation with voltage-follower buffers
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
Wide logic LCD supply range:
From 2 V for low-threshold LCDs
Up to 6 V for guest-host LCDs and high-threshold twisted nematic LCDs
Low power consumption
May be cascaded for large LCD applications (up to 2560 segments possible)
No external components
Separate or combined LCD and logic supplies
Optimized pinning for plane wiring in both and multiple PCA8576C applications
Power-saving mode for extremely low power consumption in battery-operated and
telephone applications
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 16.
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NXP Semiconductors
www.DataSheet4U.com
PCA8576C
Universal LCD driver for low multiplex rates
7. Functional description
The PCA8576C is a versatile peripheral device designed to interface between any
microprocessor or microcontroller to a wide variety of LCD segment or dot matrix displays
(see Figure 3). It can directly drive any static or multiplexed LCD containing up to four
backplanes and up to 40 segments.
dot matrix
7-segment with dot
14-segment with dot and accent
013aaa312
Fig 3. Example of displays suitable for PCA8576C
The possible display configurations of the PCA8576C depend on the number of active
backplane outputs required. A selection of display configurations is shown in Table 4. All
of these configurations can be implemented in the typical system shown in Figure 4.
Table 4. Selection of possible display configurations
Number of
Backplanes
Icons
Digits/Characters
7-segment
14-segment
4
160 20
10
3
120 15
7
2 80 10 5
1 40 5 2
Dot matrix/
Elements
160 dots (4 × 40)
120 dots (3 × 40)
80 dots (2 × 40)
40 dots (1 × 40)
PCA8576C
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 22 July 2010
© NXP B.V. 2010. All rights reserved.
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