PCF8576T,112

Overview

The PCF8576T,112 is a single-chip LCD controller and driver designed for low multiplex rate applications. It interfaces with Liquid Crystal Displays containing up to four backplanes and 40 segments via a two-line bidirectional I2C-bus. The device features internal LCD bias generation with voltage-follower buffers and includes 40 x 4-bit RAM for display data storage. It supports selectable backplane drive configurations (static or 2/3/4 backplane multiplexing) and display bias settings (static, 1/2, or 1/3). The component operates within a wide power supply range from 2 V to 9 V and offers low power consumption with a dedicated power-saving mode.

Feature Summary

• Generates drive signals for static or multiplexed LCDs with up to four backplanes and 40 segments
• Communicates via a two-line bidirectional I2C-bus compatible with most microprocessors
• Includes internal LCD bias generation with voltage-follower buffers and 40 x 4-bit display RAM
• Supports versatile blinking modes and display memory bank switching in static and duplex drive modes

Applications

• Battery-operated devices requiring extremely low power consumption
• Telephone applications with specific power constraints
• Guest-host LCD systems
• High-threshold twisted nematic LCDs used in automotive environments

Procurement Notes

Verify the exact ordering suffix and tape-and-reel specifications against the official NXP datasheet before procurement. Confirm that the I2C address configuration and package type match the design requirements. Check current availability status as distribution channels may vary. Ensure compatibility with the target microcontroller's I2C interface timing and voltage levels.

Selection Notes

Select this component for designs requiring a universal LCD driver for low multiplex rates. It is suitable for applications needing separation of LCD and logic supplies. Consider its wide power supply range when designing for varying threshold voltages. Evaluate the need for cascading capabilities if larger display areas are required beyond the 40-segment limit.

Part Context

The PCF8576 series serves as a peripheral device interfacing with almost any liquid crystal display featuring low multiplex rates. It functions as a complete solution by generating necessary drive signals without external components for bias generation. The family is known for minimizing communication overhead through auto-incremented addressing and hardware subaddressing, facilitating easy integration with standard microprocessor systems.

Replacement Considerations

PCF8576DT/2,518