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
- Operating Power-Supply Voltage Range of 1.65 V to 3.6 V
- Supports QWERTY Keypad Operation Plus GPIO Expansion
- 18 GPIOs Can Be Configured into Eight Inputs and Ten Outputs to
Support an 8 × 10 Keypad Array (80 Buttons)
- ESD Protection Exceeds JESD 22 on non-GPIO pins
- 2000-V Human Body Model (A114-A)
- 1000-V Charged Device Model (C101)
- ±15kV Human Body Model High Voltage ESD (GPIO lines)
- Low Standby (Idle) Current Consumption: 3 uA
- Polling Current Drain 70 uA for One Key Pressed
- 10 Byte FIFO to Store 10 Key Presses and Releases
- Supports 1-MHz Fast Mode Plus I2C Bus
- Open-Drain Active-Low Interrupt Output, Asserted when
Key is Pressed and Key is Released
- Minimum Debounce Time of 50 us
- 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
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
- TCA8418E 数据资料 dataSheet 下载.PDF
- TI 德州仪器I2C 逻辑器件产品选型与价格 . xls
- Logic Guide 2009 (PDF 4263 KB)
- Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
- Understanding and Interpreting Standard-Logic Data Sheets (PDF 857 KB)
- TI IBIS File Creation, Validation, and Distribution Processes (PDF 380 KB)
- Implications of Slow or Floating CMOS Inputs (PDF 101 KB)
- CMOS Power Consumption and CPD Calculation (PDF 89 KB)
- Designing With Logic (PDF 186 KB)
- Live Insertion (PDF 150 KB)
- Input and Output Characteristics of Digital Integrated Circuits (PDF 1708 KB)
- Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (PDF 43 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- LOGIC Pocket Data Book (PDF 6001 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- Logic Cross-Reference (PDF 2938 KB)