TCA8418E中文资料具有中断、复位和 80 键支持的 18 位 1.65 至 3.6V 1MHz I2C/SMBus 键盘扫描仪数据手册TI规格书

描述 Description

The TCA8418E is a keypad scan 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 to support up to 80 keys via the I2C interface.The TCA8418E saves power and bandwidths since it handles the keypad scanning algorithms. The TCA8418E is also ideal for usage with processors that have limited GPIOs.The key controller debounces inputs and maintains a 10 byte FIFO of key-press and release events which can store up to 10 keys with overflow wrap capability. An interrupt (INT) output can be configured to alert key presses and releases either as they occur, or at maximum rate. A CAD_INT pin is included to indicate the detection of CTRL-ALT-DEL (essentially, 1, 11, 21) key press action.

特性 Features

• Operating Power-Supply Voltage Range of 1.65-V to 3.6-V
• Supports 80 Buttons With Use of 18 GPIOs
• Low Standby (Idle) Current Consumption: 3 µA
• 10-Byte FIFO to Store 10 Key Presses and Releases
• Integrated Debounce Time of 50 µs
• Latch-Up Performance Exceeds 200 mA Per JESD 78, Class II
• WCSP (YFP): 2 mm × 2 mm; 0.4 mm pitch
• APPLICATIONS
• Tablets
• GPS Devices
• Digital Cameras

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应用 Application

智能电话
平板电脑
人机界面(HMI)面板
全球卫星定位(GPS)设备
MP3播放器
数码照相机