TCA8418E
- Operating Power-Supply Voltage Range of 1.65-V
to 3.6-V - ±15-kV Human Body Model High Voltage ESD
(GPIO lines) - Supports 80 Buttons With Use of 18 GPIOs
- Supports QWERTY Keypad Operation Plus GPIO
Expansion - Low Standby (Idle) Current Consumption: 3 µA
- Supports 1-MHz Fast Mode Plus I2C Bus
- 10-Byte FIFO to Store 10 Key Presses and
Releases - Open-Drain Active-Low Interrupt Output
- Integrated 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
- Tablets
- HMI Panels
- GPS Devices
- MP3 Players
- Digital Cameras
All other trademarks are the property of their respective owners
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.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | TCA8418E I2C Controlled Keypad Scan IC With Integrated ESD Protection 数据表 (Rev. C) | PDF | HTML | 2015-10-28 | ||
| 应用手册 | Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) | PDF | HTML | 2024-7-3 | |||
| 选择指南 | I2C Infographic Flyer | 2015-12-3 | ||||
| 应用手册 | Understanding the I2C Bus | PDF | HTML | 2015-6-30 | |||
| 应用手册 | Maximum Clock Frequency of I2C Bus Using Repeaters | 2015-5-15 | ||||
| 应用手册 | I2C Bus Pull-Up Resistor Calculation | PDF | HTML | 2015-2-13 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
TCA8418E-EVM — TCA8418E-EVM I2C 控制键盘扫描 IC，带集成式 ESD 保护评估模块
TCA8418E-EVM 评估板旨在演示 TCA8418E 键盘扫描 IC 的关键扫描功能。该 EVM 附带 9 个按钮，这些按钮配置在行/列矩阵中，便于测试。此外，如果需要更多行或列，借助 10x2 插座，客户可以将 TCA8418E-EVM 的功能扩展到定制电路板或键盘。可以使用 I2C 接头或通过 LaunchPad 来控制 TCA8418E-EVM，该 LaunchPad 可与 TCA8418-EVM GUI 连接。TCA8418E-EVM 的电源可由 MSP430 LaunchPad 提供或通过外部电源供电。
SLVC601 — TCA8418E-EVM Firmware and GUI
I2C-DESIGNER — I2C 设计者工具
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| DSBGA (YFP) | 25 | Ultra Librarian |
订购和质量
推荐产品可能包含与 TI 此产品相关的参数、评估模块或参考设计。