The PCA8539 is a fully featured Liquid Crystal Display (LCD) driver, specifically designedfor high-contrast Vertical Alignment (VA) LCD with multiplex rates up to 1:18. It generatesthe drive signals for multiplexed LCD containing up to 18 backplanes, 100 segments, andup to 1800 elements. The PCA8539 features an internal charge pump with internalcapacitors for on-chip generation of the LCD driving voltage. To ensure an optimal andstable contrast over the full temperature range, the PCA8539 offers a programmabletemperature compensation of the LCD supply voltage. The PCA8539 can be easilyconnected to a microcontroller by either the two-line I²C-bus or a four-line bidirectionalSPI-bus.
Feature
- AEC Q100 grade 2 compliant for automotive applications
- Single-chip LCD controller and driver
- Extended operating temperature range from -40 °C to +105 °C
- 100 segments and 18 backplanes allowing to drive any graphic with up to 1800 elements
- On-chip:
- Configurable 4, 3, or 2 times voltage multiplier generating LCD supply voltage, independent of VDD, programmable by instruction (external supply also possible)
- Integrated temperature sensor with temperature readout
- Temperature compensation of on-chip generated VLCDOUT. Selectable linear temperature compensation of VLCD
- Generation of intermediate LCD bias voltages
- Oscillator requires no external components (external clock also possible)
- Readout of RAM and registers possible
- Diagnostic features:
- Checksum on I²C and SPI bus
- Frame frequency: programmable from 45 Hz to 360 Hz
- 2960-bit RAM for storage (1800 bit for display data)
- Two-line I²C-bus interface or four-line SPI bus
- Multiplex drive mode 1:18 and 1:12
- Inversion modes:
- n-line (n = 1 to 7) inversion
- Frame inversion
- Large supply voltage range: VDD1: 2.5 V to 5.5 V (chip can be driven with battery cells)
- Analog supply voltage VDD2: 2.5 V to 5.5 V
- LCD supply voltage VLCD: 4 V to 16 V
- Very low current consumption (20 μA to 200 μA):
- Power-down mode: < 2 μA
- Automotive:
- Instrument clusters
- Climate control display
- Car entertainment
- Car radio
- Industrial:
- Medical and health care
- Measuring equipment
- Machine control systems
- Information boards
- General-purpose display modules
- Consumer:
- White goods
- Home entertainment
