PCF8576DU/DA/2,026

Overview

The PCF8576 is a universal LCD driver designed for low multiplex rates, serving as a peripheral device that interfaces with almost any Liquid Crystal Display. It generates drive signals for static or multiplexed LCDs containing up to four backplanes and forty segments. The component communicates via a two-line bidirectional I2C-bus and is compatible with most microprocessors. Key features include selectable backplane configurations (static or 2/3/4 backplane multiplexing), selectable display bias (static, 1/2, or 1/3), and internal LCD bias generation with voltage-follower buffers. It supports versatile blinking modes and allows separation of LCD and logic supplies.

Feature Summary

• Single-chip LCD controller and driver capable of generating drive signals for static or multiplexed displays with up to four backplanes and forty segments.
• Features an I2C-bus interface with auto-incremented display data loading across device subaddress boundaries to minimize communication overhead.
• Includes internal LCD bias generation with voltage-follower buffers and supports selectable display bias configurations including static, one-half, and one-third bias.
• Offers versatile blinking modes and allows the LCD and logic power supplies to be separated for flexible system design.

Applications

• Battery-operated telephone applications utilizing power-saving modes
• Automotive twisted nematic LCDs requiring high-threshold drive capabilities
• Guest-host LCD systems operating with wide power supply ranges
• Low multiplex rate liquid crystal display interfaces in consumer electronics

Procurement Notes

Verify the specific suffix and package variant when ordering, as availability may vary by region. Confirm compliance requirements such as RoHS status and material declarations prior to integration. Check current manufacturing status, as certain variants may be discontinued or subject to limited supply conditions. Ensure the selected part matches the required I2C address configuration and display RAM capacity for the target application.

Selection Notes

Select this component for applications requiring a universal driver for low multiplex rate LCDs with up to four backplanes. It is suitable for systems needing separated logic and LCD power supplies or those requiring specific bias configurations like one-half or one-third. Consider its compatibility with standard microprocessors and the benefits of auto-incremented addressing for reduced software complexity. Evaluate power consumption needs, particularly if battery operation is a priority, given the available power-saving modes.

Part Context

The PCF8576 belongs to NXP's family of universal LCD drivers designed for low multiplex rates. It serves as a peripheral interface between microprocessors and liquid crystal displays, simplifying the generation of complex drive waveforms. The device integrates display RAM and bias generation, reducing external component count. It is widely used in applications ranging from portable telephones to automotive displays where reliable segment driving is essential.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source documentation. Verify functional equivalence regarding segment count, backplane support, and I2C compatibility before considering alternative components.