TCA9538 Datasheet, PDF (2/37 Pages) Texas Instruments – Low Voltage 8-Bit I2C and SMBus Low-Power I/O Expander

TCA9538
SCPS199C – AUGUST 2014 – 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 .................................................. 5
6.5 Electrical Characteristics........................................... 5
6.6 I²C Interface Timing Requirements........................... 6
6.7 RESET Timing Requirements................................... 7
6.8 Switching Characteristics .......................................... 7
6.9 Typical Characteristics .............................................. 8
7 Parameter Measurement Information ................ 10
8 Detailed Description ............................................ 14
8.1 Overview ................................................................. 14
8.2 Functional Block Diagram ....................................... 15
8.3 Feature Description................................................. 16
8.4 Device Functional Modes........................................ 17
8.5 Programming........................................................... 17
8.6 Register Map........................................................... 19
9 Application and Implementation ........................ 23
9.1 Application Information............................................ 23
9.2 Typical Application ................................................. 23
10 Power Supply Recommendations ..................... 26
10.1 Power-On Reset Requirements ........................... 26
11 Layout................................................................... 28
11.1 Layout Guidelines ................................................. 28
11.2 Layout Example .................................................... 28
12 Device and Documentation Support ................. 29
12.1 Community Resources.......................................... 29
12.2 Trademarks ........................................................... 29
12.3 Electrostatic Discharge Caution ............................ 29
12.4 Glossary ................................................................ 29
13 Mechanical, Packaging, and Orderable
Information ........................................................... 29
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (September 2015) to Revision C
Page
• Added "Time to reset; V_CC = 1.65 - 2.3 V" parameter to RESET Timing Requirements table............................................... 7
• Added "Output data valid; V_CC = 1.65 - 2.3 V" to Switching Characteristics table. ................................................................ 7
• Updated V_{CC_GW} parameter. ................................................................................................................................................ 26
Changes from Revision A (September 2014) to Revision B
Page
• Added DB package to datasheet. .......................................................................................................................................... 1
Changes from Original (August 2014) to Revision A
Page
• Updated document to full version. ......................................................................................................................................... 1
2
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