PCF8576CH/1,157

Overview

The PCF8576CH/1,157 is a single-chip LCD controller and driver manufactured by NXP. It interfaces with low multiplex rate Liquid Crystal Displays via a two-line bidirectional I2C-bus. The device supports up to four backplanes and 40 segments, featuring 40 x 4-bit RAM for display data storage. It operates within a wide power supply range from 2 V to 9 V and includes selectable bias configurations.

Feature Summary

• Single-chip LCD controller and driver supporting static or multiplexed displays
• Two-line bidirectional I2C-bus interface compatible with most microcontrollers
• Internal LCD bias generation with voltage-follower buffers
• Display memory bank switching in static and duplex drive modes

Applications

• Battery-operated telephone applications
• Consumer products requiring low-power LCDs
• Automotive twisted nematic LCDs
• Guest-host LCD systems

Procurement Notes

Verify the specific suffix '1,157' against official NXP documentation to confirm package type and availability status. Ensure compatibility with existing I2C bus addresses and logic levels before integration. Check for end-of-life notices or recommended design alternatives if the component is discontinued.

Selection Notes

Select this component for designs requiring simple control of small segment-based LCDs without complex graphics processing. It is suitable for applications where low power consumption and minimal communication overhead are priorities. Verify that the target display multiplex rate does not exceed the device's capabilities.

Part Context

The PCF8576 series serves as a peripheral device for driving liquid crystal displays with low multiplex rates. It minimizes communication overhead through auto-incremented addressing and hardware subaddressing. The family is designed for easy cascading to support larger LCD applications beyond the native segment count.

Replacement Considerations

Consult NXP datasheets for direct pin-compatible substitutes or updated models within the PCF857x family. Verify functional equivalence regarding I2C protocols and segment drive capabilities when considering alternative drivers.