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TCA8418YFPR Datasheet(PDF) 1 Page - Texas Instruments |
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TCA8418YFPR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 37 page 1 FEATURES APPLICATIONS DESCRIPTION/ORDERING INFORMATION TCA8418 www.ti.com ......................................................................................................................................................................................... SCPS215 – SEPTEMBER 2009 I2C CONTROLLED KEYPAD SCAN IC WITH INTEGRATED ESD PROTECTION • 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 Array (80 Buttons) • ESD Protection Exceeds JESD 22 on all 18 The TCA8418 is a keypad scan device with GPIO Pins and non GPIO 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 • Low Standby (Idle) Current Consumption: 3 µA (SDA)]. • Polling Current Drain 70 µA for One Key The key controller includes an oscillator that Pressed debounces at 50 µs and maintains a 10 byte FIFO of • 10 Byte FIFO to Store 10 Key Presses and key-press and release events which can store up to 10 keys with overflow wrap capability. An interrupt Releases (/INT) output can be configured to alert key presses • Supports 1-MHz Fast Mode Plus I2C Bus and releases either as they occur, or at maximum • Open-Drain Active-Low Interrupt Output, rate. Also, for the YFP package, a CAD_INT pin is Asserted when Key is Pressed and Key is included to indicate the detection of CTRL-ALT-DEL Released (i.e., 1, 11, 21) key press action. • Minimum Debounce Time of 50 µs The major benefit of this device is it frees up the • Schmitt-Trigger Action Allows Slow Input processor from having to scan the keypad for presses and releases. This provides power and bandwidth Transition and Better Switching Noise savings. The TCA8418 is also ideal for usage with Immunity at the SCL and SDA Inputs: Typical processors that have limited GPIOs. 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 PACKAGE(1)(2) ORDERABLE PART NUMBER TOP-SIDE MARKING QFN – RTW Tape and reel TCA8418RTWR PZ418 –40°C to 85°C WCSP – YFP Tape and reel TCA8418YFPR 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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