Datasheet

1. General description
The PCA8543 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, 60 segments, and up to 240 elements. The
PCA8543 is compatible with most microcontrollers and communicates via the two-line
bidirectional I
2
C-bus. Communication overheads are minimized using a display RAM with
auto-incremented addressing and display memory switching. The PCA8543 features an
internal charge pump with internal capacitors for on-chip generation of the LCD driving
voltages.
For a selection of NXP LCD segment drivers, see Table 40 on page 59
.
2. Features and benefits
 AEC Q100 grade 2 compliant for automotive applications
 Low power consumption
 Extended operating temperature range from 40 C to +105 C
 60 segments and 4 backplanes allowing to drive:
 up to 30 7-segment alphanumeric characters
 up to 15 14-segment alphanumeric characters
 any graphics of up to 240 elements
 Selectable backplane drive configuration: static, 2, or 4 backplane multiplexing
 Programmable internal charge pump for on-chip LCD voltage generation up to
3  V
DD2
 400 kHz I
2
C-bus interface
 Selectable linear temperature compensation of V
LCD
 Selectable display bias configuration
 Wide range for digital and analog power supply: from 2.5 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 (automobile) twisted nematic LCDs
 On-chip RAM for display data storage arranged in two banks
 Display memory bank switching
 Programmable frame frequency in steps of 10 Hz in the range of 60 Hz to 300 Hz;
factory calibrated with a tolerance of 15 % covering the whole temperature and
voltage range
 Selectable inversion scheme for LCD driving waveforms: frame or line inversion
PCA8543
4 x 60 automotive LCD segment driver with integrated charge
pump
Rev. 1 — 21 January 2014 Product data sheet
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 19 on page 62.