TUSB8041-Q1 Datasheet, PDF (2/48 Pages) Texas Instruments – Automotive Four-Port USB 3.0 Hub

TUSB8041-Q1
SLLSEE6B – JULY 2014 – REVISED JANUARY 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Description (Continued) ........................................ 2
6 Pin Configuration and Functions ......................... 4
7 Specifications......................................................... 9
7.1 Absolute Maximum Ratings ..................................... 9
7.2 ESD Ratings.............................................................. 9
7.3 Recommended Operating Conditions....................... 9
7.4 Thermal Information ................................................ 10
7.5 Electrical Characteristics, 3.3-V I/O ........................ 10
7.6 Timing Requirements, Power-Up............................ 11
7.7 Hub Input Supply Current ....................................... 11
8 Detailed Description ............................................ 12
8.1 Overview ................................................................. 12
8.2 Functional Block Diagram ....................................... 12
8.3 Feature Description................................................. 12
8.4 Device Functional Modes........................................ 15
8.5 Register Maps ......................................................... 16
9 Applications and Implementation ...................... 28
9.1 Application Information............................................ 28
9.2 Typical Application .................................................. 28
10 Power Supply Recommendations ..................... 36
10.1 TUSB8041-Q1 Power Supply ............................... 36
10.2 Downstream Port Power ....................................... 36
10.3 Ground .................................................................. 36
11 Layout................................................................... 37
11.1 Layout Guidelines ................................................. 37
11.2 Layout Examples................................................... 38
12 Device and Documentation Support ................. 40
12.1 Community Resources.......................................... 40
12.2 Trademarks ........................................................... 40
12.3 Electrostatic Discharge Caution ............................ 40
12.4 Glossary ................................................................ 40
13 Mechanical, Packaging, and Orderable
Information ........................................................... 40
4 Revision History
Changes from Revision A (August 2015) to Revision B
Page
• Changed Active High. (PWRCTL_POL = 0) To: Active High. (PWRCTL_POL = 1) in Table 48 ........................................ 29
• Changed text in the Clock, Reset, and Misc section From: "The PWRCTL_POL is pulled down which results in
active low" To: "The PWRCTL_POL is left unconnected which results in active high"........................................................ 33
• Deleted R17 from pin 41 of Figure 11 ................................................................................................................................. 33
Changes from Original (July 2014) to Revision A
Page
• Added Note ""Power switching must be supported for battery charging applications"" to pin FULLPWRMGMTz /
SMBA1/SS_UP in the Pin Functions table ............................................................................................................................. 7
• Added Note "Individual power control must be enabled for battery charging applications" to pin GANGED / SMBA2 /
HS_UP in the Pin Functions table .......................................................................................................................................... 8
• Changed the Handling Ratings table to the ESD Ratings table ............................................................................................. 9
• Changed the Timing Requirements, Power-Up table: Deleted text from the t_d1 description: "There is no timing
relationship between VDD33 and VDD": Added Note 2 to the MIN value ........................................................................... 11
• Added Note: "An active reset is required.." To the Timing Requirements, Power-Up table................................................. 11
• Changed text in the Clock, Reset, and Misc section From: "The PWRCTL_POL is pulled down which results in
active high power enable" To: "The PWRCTL_POL is pulled down which results in active low power enable" ................. 33
5 Description (Continued)
The TUSB8041-Q1 supports per port or ganged power switching and over-current protection, and supports
battery charging applications.
An individually port power controlled hub switches power on or off to each downstream port as requested by the
USB host. Also when an individually port power controlled hub senses an over-current event, only power to the
affected downstream port will be switched off.
A ganged hub switches on power to all its downstream ports when power is required to be on for any port. The
power to the downstream ports is not switched off unless all ports are in a state that allows power to be removed.
Also when a ganged hub senses an over-current event, power to all downstream ports will be switched off.
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