PCF8578T/1,112

Overview

The PCF8578T/1,112 is a low-power CMOS LCD row and column driver designed for driving multiplexed dot matrix graphic displays with rates of 1:8, 1:16, 1:24, or 1:32. It features 40 configurable outputs supporting various row/column ratios such as 32/8, 24/16, 16/24, or 8/32. The device includes 1280 bits of RAM for display data storage and an on-chip oscillator requiring only one external resistor. It operates on a logic supply voltage range of 2.5 V to 6 V and supports I²C bus communication.

Feature Summary

• Single-chip LCD controller and driver capable of operating independently or cascading with up to 32 PCF8579 devices.
• Configurable output architecture allowing flexible row/column ratio settings for various multiplex rates.
• Integrated display RAM with bank switching and automatic incrementing addressing to minimize communication overhead.
• I²C bus interface compatible with most microcontrollers for efficient system integration.

Applications

• Automotive information systems
• Telecommunication equipment
• Point-of-sale (POS) terminals
• Industrial computer terminals
• Test and measurement instruments

Procurement Notes

Verify the specific suffix against official NXP documentation to confirm package type and tape/reel specifications. Confirm current availability status as distribution channels may list obsolete or limited stock items. Ensure compatibility with existing PCB footprints for the designated package variant before procurement.

Selection Notes

Select this component for applications requiring a compact solution for driving medium-complexity dot matrix LCDs. Evaluate the required multiplex rate and display size to ensure the 40-output limit and 1280-bit RAM capacity are sufficient. Consider system power constraints given the low-power CMOS design and available voltage ranges.

Part Context

The PCF8578 series serves as a primary row/column driver within NXP's LCD driver portfolio. It is specifically engineered to work in conjunction with the PCF8579 column driver to form a scalable chipset. This combination allows for the driving of large displays containing up to 40,960 points, providing a modular approach to complex display management.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Consult NXP technical support for direct replacements or pin-compatible alternatives if this specific part number is discontinued or unavailable.