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| 型号： | TCA8418EYFPR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, BGA25 |
| 封装： | 2 X 2 MM, 0.40 MM PITCH, DSBGA-25 |
| 文件页数： | 1/31页 |
| 文件大小： | 400K |
| 代理商： | TCA8418EYFPR |
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www.ti.com
SCPS222B – MAY 2010 – REVISED SEPTEMBER 2010
I2C CONTROLLED KEYPAD SCAN IC WITH INTEGRATED ESD PROTECTION
Check for Samples: TCA8418E
1
FEATURES
APPLICATIONS
Smart Phones
Operating Power-Supply Voltage Range of
1.65 V to 3.6 V
PDAs
GPS Devices
Supports QWERTY Keypad Operation Plus
GPIO Expansion
MP3 Players
Digital Cameras
18 GPIOs Can Be Configured into Eight Inputs
and Ten Outputs to Support an 8 × 10 Keypad
DESCRIPTION/ORDERING INFORMATION
Array (80 Buttons)
ESD Protection Exceeds JESD 22 on non-GPIO
The TCA8418E is a keypad scan device with
pins
integrated ESD protection. It can operate from 1.65 V
to 3.6 V and has 18 general purpose inputs/outputs
–
2000-V Human Body Model (A114-A)
(GPIO) that can be used to support up to 80 keys via
–
1000-V Charged Device Model (C101)
the I2C interface [serial clock (SCL), serial data
±15kV Human Body Model High Voltage ESD
(SDA)].
(GPIO lines)
The
key
controller
includes
an
oscillator
that
Low Standby (Idle) Current Consumption: 3 mA
debounces at 50 ms and maintains a 10 byte FIFO of
Polling Current Drain 70 mA for One Key
key-press and release events which can store up to
10 keys with overflow wrap capability. An interrupt
Pressed
(INT) output can be configured to alert key presses
10 Byte FIFO to Store 10 Key Presses and
and releases either as they occur, or at maximum
Releases
rate. Also, for the YFP package, a CAD_INT pin is
Supports 1-MHz Fast Mode Plus I2C Bus
included to indicate the detection of CTRL-ALT-DEL
(i.e., 1, 11, 21) key press action.
Open-Drain Active-Low Interrupt Output,
Asserted when Key is Pressed and Key is
The major benefit of this device is it frees up the
Released
processor from having to scan the keypad for presses
and releases. This provides power and bandwidth
Minimum Debounce Time of 50 ms
savings. The TCA8418E is also ideal for usage with
Schmitt-Trigger Action Allows Slow Input
processors that have limited GPIOs.
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
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 2010, 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| TCA8418EYFPR | 制造商:Texas Instruments 功能描述:IC I2C CONTROLLED KEYPAD SCAN 3.6V 25 |
| TCA8418RTWR | 功能描述:I2C 接口集成电路 Low-Vltg 16B I2C & SMBus I/O Expander RoHS:否 制造商:NXP Semiconductors 电源电压-最大:5.5 V 电源电压-最小:2.3 V 最大工作频率:400 KHz 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-16 |
| TCA8418YFPR | 制造商:TI 制造商全称:Texas Instruments 功能描述:I2C CONTROLLED KEYPAD SCAN IC WITH INTEGRATED ESD PROTECTION |
| TCA8424 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Check for Samples: TCA8424 |
| TCA8424EVM-038 | 功能描述:界面开发工具 TCA8424 EVAL MOD RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
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