4 X 44 Automotive LCD Driver

PCA8546

The PCA8546 is a peripheral device which generates the drive signals for any multiplexed LCD containing up to four backplanes, and up to 176 elements. The PCA8546 is compatible with many microcontrollers and communicates via the two-line bidirectional I²C-bus (PCA8546A) or a three line unidirectional SPI-bus (PCA8546B). Communication overheads are minimized using a display RAM with auto-incremented addressing.

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Features

  • AEC-Q100 grade 3 compliant for automotive applications
  • Single-chip 176 elements LCD controller and driver
  • Wide range for digital power supply: from 1.8 V to 5.5 V
  • LCD supply range from 2.5 V up to 9 V
  • LCD and logic supplies may be separated
  • Low power consumption
  • Four backplanes and selectable display bias configuration
  • On-chip RAM for display data storage
  • 400 kHz I²C-bus interface (PCA8546A)
  • 5 MHz SPI-bus interface (PCA8546B)
  • Programmable frame frequency in the range of 60 Hz to 300 Hz in steps of about 10 Hz; factory calibrated
  • 176 segments driven allowing:
    • up to 22 7-segment alphanumeric characters
    • up to 11 14-segment alphanumeric characters
    • any graphics of up to 176 elements
  • Manufactured in silicon gate CMOS process
  • Extended operating temperature range up to 95 °C

Target Applications

  • Climate control
  • Car radio
  • Dashboard display

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