TCA8418EYFPR

更新时间： 2024-11-22 11:06:51

品牌	Logo	应用领域
德州仪器 - TI		信号电路模拟IC
页数	文件大小	规格书
35页	657K
描述
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 \| YFP \| 25 \| -40 to 85

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TCA8418EYFPR 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	BGA
包装说明：	VFBGA,	针数：	25
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	1.53
模拟集成电路 - 其他类型：	ANALOG CIRCUIT	JESD-30 代码：	S-XBGA-B25
JESD-609代码：	e1	长度：	2 mm
湿度敏感等级：	1	信道数量：	1
功能数量：	1	端子数量：	25
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	UNSPECIFIED	封装代码：	VFBGA
封装形状：	SQUARE	封装形式：	GRID ARRAY, VERY THIN PROFILE, FINE PITCH
峰值回流温度（摄氏度）：	260	认证状态：	Not Qualified
座面最大高度：	0.5 mm	最大供电电压 (Vsup)：	3.6 V
最小供电电压 (Vsup)：	1.65 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子面层：	Tin/Silver/Copper (Sn/Ag/Cu)
端子形式：	BALL	端子节距：	0.4 mm
端子位置：	BOTTOM	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	2 mm	Base Number Matches：	1

TCA8418EYFPR 数据手册

TCA8418E

www.ti.com

SCPS222B –MAY 2010–REVISED SEPTEMBER 2010

I²C CONTROLLED KEYPAD SCAN IC WITH INTEGRATED ESD PROTECTION

Check for Samples: TCA8418E

FEATURES

APPLICATIONS

•

Smart Phones

PDAs

GPS Devices

MP3 Players

Digital Cameras

•

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)

DESCRIPTION/ORDERING INFORMATION

•

ESD Protection Exceeds JESD 22 on non-GPIO

pins

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)].

–

2000-V Human Body Model (A114-A)

1000-V Charged Device Model (C101)

•

±15kV Human Body Model High Voltage ESD

(GPIO lines)

The key controller includes an oscillator that

debounces at 50 ms 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.

•

Low Standby (Idle) Current Consumption: 3 mA

Polling Current Drain 70 mA 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

The major benefit of this device is it frees up the

processor from having to scan the keypad for presses

and releases. This provides power and bandwidth

savings. The TCA8418E is also ideal for usage with

processors that have limited GPIOs.

•

Minimum Debounce Time of 50 ms

Schmitt-Trigger Action Allows Slow Input

Transition and Better Switching Noise

Immunity at the SCL and SDA Inputs: Typical

V_hysat 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

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...35

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