PCA8538UG/2DA/Q1(2014) Datasheet - NXP Semiconductors.

General description
The PCA8538 is a fully featured Chip-On-Glass (COG)1 Liquid Crystal Display (LCD) driver, designed for high-contrast Vertical Alignment (VA) LCD with multiplex rates up to 1:9. It generates the drive signals for a static or multiplexed LCD containing up to 9 backplanes, 102 segments, and up to 918 segments/elements. The PCA8538 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 PCA8538 offers a programmable temperature compensation of the LCD supply voltage. The PCA8538 can be easily controlled by a microcontroller through either the two-line I2C-bus or a four-line bidirectional SPI-bus.

FEATUREs and benefits
■ AEC Q100 grade 2 compliant for automotive applications
■ Low power consumption
■ Extended operating temperature range from -40 °C to +105 °C
■ 102 segments and 9 backplanes allowing to drive:
   ◆ up to 114 7-segment numeric characters
   ◆ up to 57 14-segment alphanumeric characters
   ◆ any graphics of up to 918 segments/elements
■ 918-bit RAM for display data storage
■ Two sets of backplane outputs providing higher flexibility for optimal COG layout configurations
■ Up to 4 chips can be cascaded to drive larger displays with an internally generated or externally supplied VLCD
■ Selectable backplane drive configuration: static, 2, 4, 6, 8, or 9 backplane multiplexing
■ LCD supply voltage
   ◆ Programmable internal charge pump for on-chip LCD voltage generation up to 5 x VDD2
   ◆ External LCD voltage supply possible as well
■ Selectable 400 kHz I2C-bus or 3 MHz SPI-bus interface
■ Selectable linear temperature compensation of VLCD
■ Selectable display bias configuration
■ Wide range for digital and analog power supply: from 2.5 V to 5.5 V
■ Wide LCD voltage range from 4.0 V for low threshold LCDs up to 12.0 V for high threshold twisted nematic and Vertical Alignment (VA) displays
■ Display memory bank switching in static, duplex, and quadruplex drive modes
■ Programmable frame frequency in the range of 45 Hz to 300 Hz; factory calibrated with a tolerance of ±3 Hz (at 80 Hz)
■ Selectable inversion scheme for LCD driving waveforms: frame or n-line inversion
■ Diagnostic features for status monitoring
■ Integrated temperature sensor with temperature readout
■ On chip calibration of internal oscillator frequency and VLCD
■ Laser marking at the back-side of the die for traceability of the lot number, wafer number, and die position on the wafer

APPLICATIONs
■ Automotive
   ◆ Instrument clusters
   ◆ Climate control
   ◆ Car entertainment
   ◆ Car radio
■ Industrial
   ◆ Consumer
   ◆ Medical and health care
   ◆ Measuring equipment
   ◆ Machine control systems
   ◆ Information boards
   ◆ White goods
   ◆ General-purpose display modules