PCA8547 4 x 44 automotive LCD driver with integrated charge pump Rev. 2 7 April 2015 Product data sheet 1. General description 1 The PCA8547 is a fully featured Liquid Crystal Display (LCD) 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 2 be easily connected to a microcontroller by either the two-line I C-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 2 400 kHz I C-bus interface (PCA8547A) 5 MHz SPI-bus interface (PCA8547B) Programmable temperature compensation of V with both, negative and positive LCD 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 V LCD 1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 20.PCA8547 NXP Semiconductors 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 All information provided in this document is subject to legal disclaimers. NXP Semiconductors N.V. 2015. All rights reserved. Product data sheet Rev. 2 7 April 2015 2 of 76