TCA8418E_15 Datasheet, PDF (2/50 Pages) Texas Instruments – I2C Controlled Keypad Scan IC With Integrated ESD Protection

TCA8418E
SCPS222C – MAY 2010 – REVISED OCTOBER 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ..................................... 4
6.2 ESD Ratings ............................................................ 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics........................................... 5
6.6 I²C Interface Timing Requirements........................... 6
6.7 Reset Timing Requirements for Standard Mode, Fast
Mode, Fast Mode Plus (FM+) I²C Bus....................... 7
6.8 Switching Characteristics for Standard Mode, Fast
Mode, Fast Mode Plus (FM+) I²C Bus....................... 7
6.9 Keypad Switching Characteristics for Standard Mode,
Fast Mode, Fast Mode Plus (FM+) I²C Bus............... 7
6.10 Typical Characteristics ............................................ 8
7 Parameter Measurement Information ................ 11
8 Detailed Description ............................................ 15
8.1 Overview ................................................................. 15
8.2 Functional Block Diagram ....................................... 15
8.3 Feature Description................................................. 15
8.4 Device Functional Modes........................................ 20
8.5 Programming .......................................................... 21
8.6 Register Maps ........................................................ 25
9 Application and Implementation ........................ 36
9.1 Application Information............................................ 36
9.2 Typical Application .................................................. 38
10 Power Supply Recommendations ..................... 41
11 Layout................................................................... 43
11.1 Layout Guidelines ................................................. 43
11.2 Layout Example .................................................... 43
12 Device and Documentation Support ................. 44
12.1 Community Resources.......................................... 44
12.2 Trademarks ........................................................... 44
12.3 Electrostatic Discharge Caution ............................ 44
12.4 Glossary ................................................................ 44
13 Mechanical, Packaging, and Orderable
Information ........................................................... 44
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (September 2010) to Revision C
Page
• Added Pin Configuration and Functions section, 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
Changes from Revision A (June 2010) to Revision B
Page
• Replaced ±8-kV with ±15-kV Human Body Model High Voltage ESD (GPIO lines) .............................................................. 1
• Replaced all TBD values ........................................................................................................................................................ 5
2
Submit Documentation Feedback
Product Folder Links: TCA8418E
Copyright © 2010–2015, Texas Instruments Incorporated