TCA8418
- Operating Power-Supply Voltage Range of 1.65-V to 3.6-V
- 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
- ESD Protection Exceeds JESD 22 on all 18 GPIO Pins and non GPIO pins
- 2000-V Human Body Model (A114-A)
- 1000-V Charged Device Model (C101)
The TCA8418 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 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.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | TCA8418 I2C Controlled Keypad Scan IC With Integrated ESD Protection datasheet (Rev. G) | PDF | HTML | 2018/6/25 | ||
| 應用說明 | Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) | PDF | HTML | 2024/7/3 | |||
| 應用說明 | Understanding the I2C Bus | PDF | HTML | 2015/6/30 | |||
| 應用說明 | Maximum Clock Frequency of I2C Bus Using Repeaters | 2015/5/15 | ||||
| 應用說明 | I2C Bus Pull-Up Resistor Calculation | PDF | HTML | 2015/2/13 |
設計與開發
如需其他條款或必要資源,請按一下下方的任何標題以檢視詳細頁面 (如有)。
TCA8418E-EVM — 具有整合式 ESD 防護的 TCA8418E-EVM I2C 控制鍵盤掃描 IC 評估模組
TCA8418E-EVM 為一款評估板,旨在展示 TCA8418E 鍵盤掃描 IC 的主要掃描功能。EVM 隨附 9 個以行/列矩陣形式配置的按鈕,可輕鬆進行測試。此外,如果需要更多行或列,客戶可利用 10x2 插座將 TCA8418E-EVM 的功能擴展至自訂電路板或鍵盤。TCA8418E-EVM 可以使用 I2C 接頭或透過 LaunchPad 控制,LaunchPad 可與 TCA8418-EVM GUI 介接。TCA8418E-EVM 的電源可由 MSP430 LaunchPad 或外部電源供電。
SCPC008 — TCA8418EVMGUI
I2C-DESIGNER — I2C 設計工具
TIDA-00818 — 行動銷售點 (mPOS) 電源參考設計
TIDA-00818 是行動銷售點 (mPOS) 參考設計,採用 1S1P 鋰離子電池架構,可縮減系統尺寸和成本。整合式負載開關可減少待機耗電量,並盡可能延長電池壽命,實現單芯架構。也配備 USB Type-C 充電連接埠,可支援更高的功率傳輸,並大幅縮短充電時間。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WQFN (RTW) | 24 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。