MCP23009数据手册集成电路（IC）的I/O扩展器规格书PDF

描述 Description

MCP23009 is an 8-bit I/O expander with I2C™Compatible interface operating at speeds of up to 3.4MHz. The MCP23009 is available in 18-pin PDIP (300 mil), 18-pin SOIC (300 mil) and 20-pin SSOP packages.

特性 Features

I/O pins default to input
5.5V tolerant
25 mA sink
200 mA total
Low standby current as low as 1 µA
High-speed I2C™ interface: 100 kHz, 400 kHz,3.4MHz
Single hardware address pin: Voltage input to allow up to eight devices on the bus
Configurable interrupt output pins: Configurable as active-high, active-low or open-drain
Configurable interrupt source: Interrupt-on-change from configured defaults or pin change
Polarity inversion register to configure the polarity of the input port data
External reset input

简介

MCP23009属于集成电路（IC）的I/O扩展器。由制造生产的MCP23009I/O 扩展器该系列器件可与微控制器、微处理器或类似器件结合使用，目的是增加可用于连接外设的信号连接数量。典型的工作概念涉及使用串行通信，只需主机设备上的几根 I/O 线，即可读/写扩展器设备上的许多输入/输出引脚的状态。该技术的通信速度不佳，但连通性较高，最适合快速响应不是很关键的应用，例如许多人机界面应用。