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NXP Semiconductors Electronic Components Datasheet

PCA8547 Datasheet

LCD driver

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PCA8547
4 x 44 automotive LCD driver with integrated charge pump
Rev. 2 — 7 April 2015
Product data sheet
1. General description
The PCA8547 is a fully featured Liquid Crystal Display (LCD)1 driver, specifically designed
for high-contrast Vertical Alignment (VA) LCD with multiplex rates up to 1:4. It generates
the drive signals for any static or multiplexed LCD containing up to four backplanes,
44 segments, and up to 176 elements. The PCA8547 features an internal charge pump
with internal capacitors for on-chip generation of the LCD driving voltage. To ensure an
optimal and stable contrast over the full temperature range, the PCA8547 offers a
programmable temperature compensation of the LCD supply voltage. The PCA8547 can
be easily connected to a microcontroller by either the two-line I2C-bus (PCA8547A) or a
three-line bidirectional SPI-bus (PCA8547B).
For a selection of NXP LCD segment drivers, see Table 43 on page 66.
2. Features and benefits
AEC Q100 compliant for automotive applications.
Low-power single-chip LCD controller and driver
176 elements allowing to drive:
up to 22 7-segment alphanumeric characters
up to 11 14-segment alphanumeric characters
Selectable backplane drive configuration: static, 2, or 4 backplane multiplexing
Software programmable internal charge pump for on-chip LCD voltage generation up
to 9 V with internal capacitors
400 kHz I2C-bus interface (PCA8547A)
5 MHz SPI-bus interface (PCA8547B)
Programmable temperature compensation of VLCD with both, negative and positive
slopes in four temperature regions
Selectable display bias configuration
Wide range for digital power supply: from 1.8 V to 5.5 V
Wide LCD supply range: from 2.5 V for low threshold LCDs and up to 9.0 V for high
threshold twisted nematic LCDs
On-chip RAM for display data storage arranged in two banks
Display memory bank switching
Programmable frame frequency in the range of 60 Hz to 300 Hz in steps of 10 Hz;
factory calibrated
Integrated temperature sensor with temperature readout
On chip calibration of internal oscillator frequency and VLCD
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 20.


NXP Semiconductors Electronic Components Datasheet

PCA8547 Datasheet

LCD driver

No Preview Available !

NXP Semiconductors
PCA8547
4 x 44 automotive LCD driver with integrated charge pump
Manufactured in silicon gate CMOS process
Two RAM banks provided
3. Applications
Instrument cluster
Car radio
Climate control units
PCA8547
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 7 April 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
2 of 76


Part Number PCA8547
Description LCD driver
Maker NXP
Total Page 3 Pages
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