Universal LCD Driver for Low Multiplex Rates Including A Six-Channel PWM Generator

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Product Details

Block Diagram




  • Single-chip 320 segment LCD controller and driver with 6 channel PWM generator
  • 6 channel PWM generator for backlight LED illumination
  • 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
  • Low power consumption
  • Selectable backplane drive configuration: 4, 6, or 8 backplane multiplexing
  • LCD and logic supplies may be separated
  • 320-bit RAM for display data storage
  • 6 PWM outputs with a 7-bit resolution (128 steps) and drivers for external transistors
  • Programmable PWM frame frequency to avoid LCD backlight flickering
  • 400 kHz I²C-bus interface (PCF8536AT)
  • 5 MHz SPI-bus interface (PCF8536BT)
  • Programmable frame frequency in the range of 60 Hz to 300 Hz in steps of approximately 10 Hz; factory calibrated
  • 320 segments driven allowing:
    • up to 40 7-segment alphanumeric characters
    • up to 20 14-segment alphanumeric characters
    • any graphics of up to 320 elements
  • Manufactured in silicon gate CMOS process

Target Applications

  • White goods and consumer products

Part numbers include: PCF8536AT, PCF8536BT.


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