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TCA8418 Datasheet(PDF) 2 Page - Texas Instruments

Part # TCA8418
Description  I2C Controlled Keypad Scan IC
Download  54 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TCA8418 Datasheet(HTML) 2 Page - Texas Instruments

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TCA8418
SCPS215E – SEPTEMBER 2009 – REVISED NOVEMBER 2015
www.ti.com
Table of Contents
8.2
Functional Block Diagram ....................................... 15
1
Description ............................................................. 1
8.3
Feature Description................................................. 15
2
Applications ........................................................... 1
8.4
Device Functional Modes........................................ 20
3
Description ............................................................. 1
8.5
Programming .......................................................... 21
4
Revision History..................................................... 2
8.6
Register Maps ........................................................ 25
5
Pin Configuration and Functions ......................... 3
9
Application and Implementation ........................ 37
6
Specifications......................................................... 4
9.1
Application Information............................................ 37
6.1
Absolute Maximum Ratings ..................................... 4
9.2
Typical Application .................................................. 38
6.2
ESD Ratings.............................................................. 4
10
Power Supply Recommendations ..................... 42
6.3
Recommended Operating Conditions ....................... 4
11
Layout................................................................... 44
6.4
Thermal Information .................................................. 4
11.1
Layout Guidelines ................................................. 44
6.5
Electrical Characteristics........................................... 5
11.2
Layout Example .................................................... 44
6.6
I2C Interface Timing Requirements........................... 6
12
Device and Documentation Support ................. 45
6.7
Reset Timing Requirements ..................................... 6
12.1
Community Resources.......................................... 45
6.8
Switching Characteristics .......................................... 7
12.2
Trademarks ........................................................... 45
6.9
Keypad Switching Characteristics............................. 7
12.3
Electrostatic Discharge Caution ............................ 45
6.10
Typical Characteristics ............................................ 8
12.4
Glossary ................................................................ 45
7
Parameter Measurement Information ................ 11
13
Mechanical, Packaging, and Orderable
8
Detailed Description ............................................ 15
Information ........................................................... 45
8.1
Overview ................................................................. 15
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision D (July 2014) to Revision E
Page
Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section ................................................................................................. 1
Updated Register Descriptions table. .................................................................................................................................. 25
Changes from Revision B (March 2010) to Revision C
Page
Added CAD Interrupt Errata section. .................................................................................................................................... 35
Added Overflow Errata section. ........................................................................................................................................... 36
2
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Product Folder Links: TCA8418


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