PCF8579T/1,118

Overview

The PCF8579T/1,118 is a low-power CMOS LCD column driver designed for driving multiplexed dot matrix displays with multiplex rates of 1:8, 1:16, 1:24, or 1:32. It features 40 outputs capable of driving 32 rows in a 32 x 40 point display and includes 1280 bits of display RAM with auto-increment addressing to minimize communication overhead. The device communicates via a two-line bidirectional I²C bus and supports cascading up to 16 units on the same bus using two slave addresses. It operates within a logic supply voltage range of 2.5 V to 6 V and a maximum LCD supply voltage of 9 V.

Feature Summary

• Provides 40 column outputs for driving multiplexed LCD matrices
• Integrates 1280-bit display RAM with auto-increment addressing
• Supports flexible multiplex rates including 1:8, 1:16, 1:24, and 1:32
• Enables cascading of multiple devices for large-scale display applications

Applications

• Automotive information systems
• Telecommunications equipment
• Point-of-sale (POS) terminals
• Industrial computer terminals
• Instrumentation and metering devices

Procurement Notes

Verify component authenticity through authorized NXP distributors or certified partners. Confirm RoHS compliance status and check current lifecycle status as this part may be discontinued or subject to limited availability. Ensure proper handling for ESD-sensitive components during storage and installation.

Selection Notes

Select this component when designing systems requiring dedicated column drivers for dot matrix LCDs. It is intended to be paired with row drivers like the PCF8578 to form a complete display solution. Consider the required multiplex rate and total pixel count to ensure compatibility with the 32x40 output configuration.

Part Context

This component belongs to the PCF857x series of LCD drivers from NXP Semiconductors. It functions specifically as a column driver complementing row drivers in a chipset architecture. This combination allows for the creation of universal LCD dot matrix driver solutions capable of driving displays with significant pixel counts.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.