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TCA8418E 具有集成 ESD 保护的 I2C 控制键盘扫描 IC

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 [serial clock (SCL), serial data (SDA)].

The key controller includes an oscillator that debounces at 50 us 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. Also, for the YFP package, a CAD_INT pin is included to indicate the detection of CTRL-ALT-DEL (i.e., 1, 11, 21) key press action.

The major benefit of this device is it frees up the processor from having to scan the keypad for presses and releases

TCA8418E
No. of Outputs 18
tpd max(ns) 120
Operating Temperature Range(°C) -40 to 85
Rating Catalog
VCC(Min)(V) -0.5
VCC(Max)(V) 4.6
Pin/Package 25DSBGA
Max Frequency(kHz) 1000
Function Keypad Scan IC with ESD
I2C Address 0110100
Vcc range(V) 1.65 to 3.6
Enable Pin No
Open–Drain I/O Type No
5V Tolerant I/O No
Push–Pull I/O Type Yes
TCA8418E 特性
TCA8418E 芯片订购指南
器件 状态 温度 价格 封装 | 引脚 封装数量 | 封装载体 丝印标记
TCA8418EYFPR ACTIVE -40 to 85 1.20 | 1ku SM8 (DCT) | 8 3000 | LARGE T&R  
TCA8418E 质量与无铅数据
器件 环保计划* 铅/焊球涂层 MSL 等级/回流焊峰 环保信息与无铅 (Pb-free) DPPM / MTBF / FIT 率
TCA8418EYFPR Green (RoHS & no Sb/Br) SNAGCU Level-1-260C-UNLIM TCA8418EYFPR TCA8418EYFPR
TCA8418E 应用技术支持与电子电路设计开发资源下载
  1. TCA8418E 数据资料 dataSheet 下载.PDF
  2. TI 德州仪器I2C 逻辑器件产品选型与价格 . xls
  3. Logic Guide 2009 (PDF 4263 KB)
  4. Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
  5. Understanding and Interpreting Standard-Logic Data Sheets (PDF 857 KB)
  6. TI IBIS File Creation, Validation, and Distribution Processes (PDF 380 KB)
  7. Implications of Slow or Floating CMOS Inputs (PDF 101 KB)
  8. CMOS Power Consumption and CPD Calculation (PDF 89 KB)
  9. Designing With Logic (PDF 186 KB)
  10. Live Insertion (PDF 150 KB)
  11. Input and Output Characteristics of Digital Integrated Circuits (PDF 1708 KB)
  12. Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (PDF 43 KB)
  13. HiRel Unitrode Power Management Brochure (PDF 206 KB)
  14. LOGIC Pocket Data Book (PDF 6001 KB)
  15. HiRel Unitrode Power Management Brochure (PDF 206 KB)
  16. Logic Cross-Reference (PDF 2938 KB)