TCA6418E集成电路（IC）的I/O扩展器规格书PDF中文资料

TCA6418E属于集成电路（IC）的I/O扩展器。由德州仪器制造生产的TCA6418EI/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。

1FEATURES

• Operating Power-Supply Voltage Range of

1.65 V to 3.6 V

• 18 GPIOs Configurable as Inputs or Outputs

• ESD Protection Exceeds JESD 22 on Non-

GPIO Pins

– 2000-V Human Body Model (A114-A)

– 1000-V Charged Device Model (C101)

• Low Standby (Idle) Current Consumption: 3 μA

• Supports 1-MHz Fast Mode Plus I2C Bus

• Open-Drain Active-Low Interrupt Output,

Asserted When Key is Pressed or Key is

Released

• Selectable Debounce Time of 50 μs

• Schmitt-Trigger Action Allows Slow Input

Transition and Better Switching Noise

Immunity at the SCL and SDA Inputs: Typical

Vhys at 1.8 V is 0.18 V

• Latch-Up Performance Exceeds 200 mA Per

JESD 78, Class II

• Very Small Package

– WCSP (YFP): 2 mm × 2 mm; 0.4 mm pitch

APPLICATIONS

• Smart Phones

• PDAs

• GPS Devices

• MP3 Players

• Digital Cameras

DESCRIPTION/ORDERING INFORMATION

The TCA6418E is a 18 channel GPIO expansion device with integrated ESD protection. It can operate from 1.65

V to 3.6 V and has 18 general purpose inputs/outputs (GPIO) that can be used via the I2C interface [serial clock

(SCL), serial data (SDA)].

The major benefit of this device is it frees up the processor from having to individually monitor changes in

multiple inputs and also frees up the GPIOs on the processor to drive other outputs.. This provides power and

bandwidth savings. The TCA6418E is also ideal for usage with processors that have limited GPIOs.