PCF8579HT/1

PCF8579 系列 6 V LCD列驱动器 用于点阵图形显示器 - TQFP-64

Overview

The PCF8579 is a low power CMOS LCD column driver, designed to drive dot matrix graphic displays at multiplex rates of 1:8, 1:16, 1:24 or 1:32. The device has 40 outputs and can drive 32 x 40 dots in a 32 row multiplexed LCD. Up to 16 PCF8579 can be cascaded and up to 32 devices may be used on the same I²C-bus using the two slave addresses. The device is optimized for use with the PCF8578 LCD row/column driver. Together these devices form a general purpose LCD dot matrix driver chip set, capable of driving displays of up to 40960 dots. The PCF8579 is compatible with most microcontrollers and communicates via a two-line bidirectional bus I²C-bus. To allow partial VDD shutdown the ESD protection system of the SCL and SDA pins does not use a diode connected to VDD. Communication overhead is minimized by a display RAM with auto-incremented addressing and display bank switching.

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## Features

* LCD column driver

* Used in conjunction with the PCF8578, this device forms part of a chip set capable of driving up to 40960 dots

* 40 column outputs

* Selectable multiplex rates; 1:8, 1:16, 1:24 or 1:32

* Externally selectable bias configuration, 5 or 6 levels

* Easily cascadable for large applications up to 32 devices

* 1280-bit RAM for display data storage

* Display memory bank switching

* Auto-incremented data loading across hardware subaddress boundaries with PCF8578

* Power-On Reset POR blanks display

* Logic voltage supply range 2.5 V to 6 V

* Maximum LCD supply voltage 9 V

* Low power consumption

* I²C-bus interface

* Compatible with most microcontrollers

* Optimized pinning for single plane wiring in multiple device applications with PCF8578

* Space saving 56-lead small outline package and 64-pin quad flat pack

## Target Applications

* Automotive information systems

* Telecommunication systems

* Point-of-sale terminals

* Industrial computer terminals

* Instrumentation

## Features