TCA9546A Datasheet, PDF (2/31 Pages) Texas Instruments – Low Voltage 4-Channel I2C and SMBus Switch with Reset Function

TCA9546A
SCPS205A – APRIL 2014 – REVISED FEBRUARY 2015
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Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Simplified Application Diagram............................ 1
5 Revision History..................................................... 2
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings .................................... 4
7.2 ESD Ratings.............................................................. 4
7.3 Recommended Operating Conditions ..................... 4
7.4 Thermal Information .................................................. 4
7.5 Electrical Characteristics.......................................... 5
7.6 I²C Interface Timing Requirements.......................... 6
7.7 Switching Characteristics......................................... 6
7.8 Interrupt and Reset Timing Requirements............... 7
7.9 Typical Characteristics .............................................. 7
8 Parameter Measurement Information .................. 8
9 Detailed Description ............................................ 10
9.1 Overview ................................................................. 10
9.2 Functional Block Diagram ....................................... 10
9.3 Feature Description................................................. 11
9.4 Device Functional Modes........................................ 11
9.5 Programming........................................................... 11
9.6 Control Register ...................................................... 14
10 Application and Implementation........................ 16
10.1 Application Information.......................................... 16
10.2 Typical Application ................................................ 16
11 Power Supply Recommendations ..................... 19
11.1 Power-On Reset Requirements ........................... 19
12 Layout................................................................... 21
12.1 Layout Guidelines ................................................. 21
12.2 Layout Example .................................................... 21
13 Device and Documentation Support ................. 22
13.1 Trademarks ........................................................... 22
13.2 Electrostatic Discharge Caution ............................ 22
13.3 Glossary ................................................................ 22
14 Mechanical, Packaging, and Orderable
Information ........................................................... 22
5 Revision History
Changes from Original (April 2014) to Revision A
Page
• Added D package to the datasheet. ...................................................................................................................................... 1
• Changed Handling Ratings table to ESD Ratings. ................................................................................................................ 4
• Added D package to the Thermal Information table. ............................................................................................................. 4
2
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