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TCA8418RTWR

更新时间： 2024-11-21 06:15:47
品牌 Logo 应用领域
德州仪器 - TI 电信集成电路电信电路PC
页数 文件大小 规格书
37页 831K
描述
I2C CONTROLLED KEYPAD SCAN IC WITH INTEGRATED ESD PROTECTION

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中文翻译

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TCA8418RTWR 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：QFN
包装说明：QFN-24针数：24
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：6 weeks
风险等级：0.9Samacsys Confidence：3
Samacsys Status：ReleasedSamacsys PartID：349556
Samacsys Pin Count：25Samacsys Part Category：Integrated Circuit
Samacsys Package Category：Quad Flat No-LeadSamacsys Footprint Name：WQFN-24
Samacsys Released Date：2017-01-12 12:59:53Is Samacsys：N
JESD-30 代码：S-PQCC-N24JESD-609代码：e4
长度：4 mm湿度敏感等级：2
功能数量：1端子数量：24
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：HVQCCN
封装形状：SQUARE封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：0.8 mm标称供电电压：1.8 V
表面贴装：YES电信集成电路类型：TELECOM CIRCUIT
温度等级：INDUSTRIAL端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式：NO LEAD端子节距：0.5 mm
端子位置：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：4 mmBase Number Matches：1

TCA8418RTWR 数据手册

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TCA8418  
www.ti.com ......................................................................................................................................................................................... SCPS215–SEPTEMBER 2009  
I2C CONTROLLED KEYPAD SCAN IC WITH INTEGRATED ESD PROTECTION  
1
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 all 18  
GPIO Pins and non GPIO pins  
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 [serial clock (SCL), serial data  
(SDA)].  
–
–
2000-V Human Body Model (A114-A)  
1000-V Charged Device Model (C101)  
•
•
Low Standby (Idle) Current Consumption: 3 µA  
Polling Current Drain 70 µA for One Key  
Pressed  
The key controller includes an oscillator that  
debounces at 50 µs 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.  
•
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 µs  
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 TCA8418 is also ideal for usage with  
processors that have limited GPIOs.  
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 Packages  
–
–
WCSP (YFP): 2 mm × 2 mm; 0.4 mm pitch  
QFN (RTW): 4 mm × 4 mm; 0.5 mm pitch  
ORDERING INFORMATION  
TA  
–40°C to 85°C  
PACKAGE(1)(2)  
ORDERABLE PART NUMBER  
TOP-SIDE MARKING  
PZ418  
QFN – RTW  
Tape and reel  
Tape and reel  
TCA8418RTWR  
TCA8418YFPR  
WCSP – YFP  
PREVIEW  
(1) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.  
(2) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI  
website at www.ti.com.  
1
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.  
Copyright © 2009, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
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