TCA9548A_15 Datasheet, PDF (2/35 Pages) Texas Instruments – Low-Voltage 8-Channel I2C Switch With Reset

TCA9548A
SCPS207E – MAY 2012 – REVISED OCTOBER 2015
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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 .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 I²C Interface Timing Requirements........................... 6
6.7 Switching Characteristics .......................................... 6
6.8 Reset Timing Requirements ..................................... 7
6.9 Typical Characteristics .............................................. 7
7 Parameter Measurement Information .................. 8
8 Detailed Description ............................................ 10
8.1 Overview ................................................................. 10
8.2 Functional Block Diagram ....................................... 11
8.3 Feature Description................................................. 12
8.4 Device Functional Modes........................................ 12
8.5 Programming........................................................... 12
9 Application and Implementation ........................ 18
9.1 Application Information............................................ 18
9.2 Typical Application .................................................. 18
10 Power Supply Recommendations ..................... 22
10.1 Power-On Reset Requirements ........................... 22
11 Layout................................................................... 23
11.1 Layout Guidelines ................................................. 23
11.2 Layout Example .................................................... 24
12 Device and Documentation Support ................. 25
12.1 Community Resources.......................................... 25
12.2 Trademarks ........................................................... 25
12.3 Electrostatic Discharge Caution ............................ 25
12.4 Glossary ................................................................ 25
13 Mechanical, Packaging, and Orderable
Information ........................................................... 25
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision D (January 2015) to Revision E
Page
• Updated Pin Functions table. ................................................................................................................................................ 3
• Added new I²C Sections and read/write description ........................................................................................................... 14
Changes from Revision C (November 2013) to Revision D
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
• Updated Typical Application schematic. .............................................................................................................................. 19
Changes from Revision B (November 2013) to Revision C
Page
• Updated V_POR and I_CC standby specification. ......................................................................................................................... 5
Changes from Revision A (July 2012) to Revision B
Page
• Updated document formatting. ............................................................................................................................................... 1
• Removed ordering information. .............................................................................................................................................. 1
2
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