Overview

The LC709006A is a peripheral IC dedicated for expanding the capability of the microcontroller (MCU) I/O ports. It interfaces with the microcontroller through synchronous serial communication. Communication with the extended I/O ports is accomplished through 24-bit parallel I/O. The extended port features include the capabilities to specify the I/O direction on a bit basis, to specify the output type (CMOS or N-channel open drain), and to specify the I/O voltage level on a port basis according to the power level of the peripheral equipment. These features make allow the LC709004A to be used in a wide variety of applications.

Features

• 4-/5-wire synchronous serial transmission and reception, and 24-bit parallel I/O

• Wide operating voltage range (2.0V to 6.0V)

• Multifunction I/O ports

- I/O direction specification: Bit units

- CMOS or Nch-OD output type specification: Bit units

- Output voltage adjustment: Port (8 bits) units

• Output current: 12mA max. (capable of driving a green LED directly)

• Data transmission and reception: Can control reception of input data and transmission of output data in parallel.

• Cascaded configuration: Ports can be expanded in units of 24 bits × n (n is the number of LSI chips).

• Packaging from: MFP36SDJ (375mil): lead-free type

LC709006A属于集成电路（IC） > I/O 扩展器。安森美半导体公司制造生产的LC709006AI/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。