Universal LCD Driver for Multiplex Rates Up to 1-8

PCF8545

The PCF8545 is a peripheral device which interfaces to almost any Liquid Crystal Display (LCD) with low multiplex rates. It generates the drive signals for any multiplexed LCD containing up to eight backplanes, and up to 320 elements. The PCF8545 is compatible with most microcontrollers and communicates via the two-line bidirectional I2C-bus (PCF8545A) or a three line unidirectional SPI-bus (PCF8545B). Communication overheads are minimized using a display RAM with auto-incremented addressing.

Product Details

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Features

Key Features

  • Wide range for digital power supply: from 1.8 V to 5.5 V
  • LCD supply range from 2.5 V up to 5.5 V
  • LCD and logic supplies may be separated
  • Low power consumption
  • Selectable backplane drive configuration: 4, 6, or 8 backplane multiplexing
  • Selectable display bias configuration
  • 320-bit RAM for display data storage
  • 400 kHz I²C-bus interface (PCF8545A)
  • 5 MHz SPI-bus interface (PCF8545B)
  • Programmable frame frequency in the range of 60 Hz to 300 Hz in steps of 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

Product Longevity Program

  • This product is included in the NXP Product Longevity Program ensuring a stable supply of products for your embedded designs. The PCF8545ATT/A and the PCF8545BTT/A are included in the 15-year program

Documentation

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Design Files

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