SLLSEE4E June   2014  – June 2016 TUSB8041

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (Continued)
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics, 3.3-V I/O
    6. 7.6 Timing Requirements, Power-Up
    7. 7.7 Hub Input Supply Current
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Battery Charging Features
      2. 8.3.2 USB Power Management
      3. 8.3.3 One Time Programmable (OTP) Configuration
      4. 8.3.4 Clock Generation
      5. 8.3.5 Crystal Requirements
      6. 8.3.6 Input Clock Requirements
      7. 8.3.7 Power-Up and Reset
    4. 8.4 Device Functional Modes
      1. 8.4.1 External Configuration Interface
      2. 8.4.2 I2C EEPROM Operation
      3. 8.4.3 SMBus Slave Operation
    5. 8.5 Register Maps
      1. 8.5.1  Configuration Registers
      2. 8.5.2  ROM Signature Register
      3. 8.5.3  Vendor ID LSB Register
      4. 8.5.4  Vendor ID MSB Register
      5. 8.5.5  Product ID LSB Register
      6. 8.5.6  Product ID MSB Register
      7. 8.5.7  Device Configuration Register
      8. 8.5.8  Battery Charging Support Register
      9. 8.5.9  Device Removable Configuration Register
      10. 8.5.10 Port Used Configuration Register
      11. 8.5.11 Device Configuration Register 2
      12. 8.5.12 USB 2.0 Port Polarity Control Register
      13. 8.5.13 UUID Registers
      14. 8.5.14 Language ID LSB Register
      15. 8.5.15 Language ID MSB Register
      16. 8.5.16 Serial Number String Length Register
      17. 8.5.17 Manufacturer String Length Register
      18. 8.5.18 Product String Length Register
      19. 8.5.19 Serial Number String Registers
      20. 8.5.20 Manufacturer String Registers
      21. 8.5.21 Product String Registers
      22. 8.5.22 Additional Feature Configuration Register
      23. 8.5.23 Device Status and Command Register
  9. 9 Applications and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Discrete USB Hub Product
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Upstream Port Implementation
          2. 9.2.1.2.2 Downstream Port 1 Implementation
          3. 9.2.1.2.3 Downstream Port 2 Implementation
          4. 9.2.1.2.4 Downstream Port 3 Implementation
          5. 9.2.1.2.5 Downstream Port 4 Implementation
          6. 9.2.1.2.6 VBUS Power Switch Implementation
          7. 9.2.1.2.7 Clock, Reset, and Misc
          8. 9.2.1.2.8 TUSB8041 Power Implementation
        3. 9.2.1.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 TUSB8041 Power Supply
    2. 10.2 Downstream Port Power
    3. 10.3 Ground
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Placement
      2. 11.1.2 Package Specific
      3. 11.1.3 Differential Pairs
    2. 11.2 Layout Examples
      1. 11.2.1 Upstream Port
      2. 11.2.2 Downstream Port
  12. 12Device and Documentation Support
    1. 12.1 Community Resources
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

9 Applications and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

9.1 Application Information

The TUSB8041 is a four-port USB 3.0 compliant hub. It provides simultaneous SuperSpeed USB and high-speed/full-speed connections on the upstream port and provides SuperSpeed USB, high-speed, full-speed, or low speed connections on the downstream port. The TUSB8041 can be used in any application that needs additional USB compliant ports. For example, a specific notebook may only have two downstream USB ports. By using the TUSB8041, the notebook can increase the downstream port count to five.

9.2 Typical Application

9.2.1 Discrete USB Hub Product

A common application for the TUSB8041 is as a self powered standalone USB hub product. The product is powered by an external 5V DC Power adapter. In this application, using a USB cable TUSB8041’s upstream port is plugged into a USB Host controller. The downstream ports of the TUSB8041 are exposed to users for connecting USB hard drives, cameras, flash drives, and so forth.

TUSB8041 discrete_USB_hub_sllsee4.gif Figure 4. Discrete USB Hub Product

9.2.1.1 Design Requirements

Table 48. Design Parameters

DESIGN PARAMETER EXAMPLE VALUE
VDD Supply 1.1V
VDD33 Supply 3.3V
Upstream Port USB Support (SS, HS, FS) SS, HS, FS
Downstream Port 1 USB Support (SS, HS, FS, LS) SS, HS, FS, LS
Downstream Port 2 USB Support (SS, HS, FS, LS) SS, HS, FS, LS
Downstream Port 3 USB Support (SS, HS, FS, LS) SS, HS, FS, LS
Downstream Port 4 USB Support (SS, HS, FS, LS) SS, HS, FS, LS
Number of Removable Downstream Ports 4
Number of Non-Removable Downstream Ports 0
Full Power Management of Downstream Ports Yes. (FULLPWRMGMTZ = 0)
Individual Control of Downstream Port Power Switch Yes. (GANGED = 0)
Power Switch Enable Polarity Active High. (PWRCTL_POL = 1)
Battery Charge Support for Downstream Port 1 Yes
Battery Charge Support for Downstream Port 2 Yes
Battery Charge Support for Downstream Port 3 Yes
Battery Charge Support for Downstream Port 4 Yes
I2C EEPROM Support No.
24MHz Clock Source Crystal

9.2.1.2 Detailed Design Procedure

9.2.1.2.1 Upstream Port Implementation

The upstream of the TUSB8041 is connected to a USB3 Type B connector. This particular example has GANGED pin and FULLPWRMGMTZ pin pulled low which results in individual power support each downstream port. The VBUS signal from the USB3 Type B connector is feed through a voltage divider. The purpose of the voltage divider is to make sure the level meets USB_VBUS input requirements

TUSB8041 upstream_port_imp_sllsee4.gif Figure 5. Upstream Port Implementation

9.2.1.2.2 Downstream Port 1 Implementation

The downstream port 1 of the TUSB8041 is connected to a USB3 Type A connector. With BATEN1 pin pulled up, Battery Charge support is enabled for Port 1. If Battery Charge support is not needed, then pull-up resistor on BATEN1 should be uninstalled.

TUSB8041 downstream_port1_imp_sllsee4.gif Figure 6. Downstream Port 1 Implementation

9.2.1.2.3 Downstream Port 2 Implementation

The downstream port 2 of the TUSB8041 is connected to a USB3 Type A connector. With BATEN2 pin pulled up, Battery Charge support is enabled for Port 2. If Battery Charge support is not needed, then pull-up resistor on BATEN2 should be uninstalled.

TUSB8041 downstream_port2_imp_sllsee4.gif Figure 7. Downstream Port 2 Implementation

9.2.1.2.4 Downstream Port 3 Implementation

The downstream port3 of the TUSB8041 is connected to a USB3 Type A connector. With BATEN3 pin pulled up, Battery Charge support is enabled for Port 3. If Battery Charge support is not needed, then pull-up resistor on BATEN3 should be uninstalled.

TUSB8041 downstream_port3_imp_sllsee4.gif Figure 8. Downstream Port 3 Implementation

9.2.1.2.5 Downstream Port 4 Implementation

The downstream port 4 of the TUSB8041 is connected to a USB3 Type A connector. With BATEN4 pin pulled up, Battery Charge support is enabled for Port 4. If Battery Charge support is not needed, then pull-up resistor on BATEN4 should be uninstalled.

TUSB8041 downstream_port4_imp_sllsee4.gif Figure 9. Downstream Port 4 Implementation

9.2.1.2.6 VBUS Power Switch Implementation

This particular example uses the Texas Instruments TPS2561 Dual Channel Precision Adjustable Current-Limited power switch. For details on this power switch or other power switches available from Texas Instruments, refer to the Texas Instruments website.

TUSB8041 vbus_imp_sllsee4.gif Figure 10. VBUS Power Switch Implementation

9.2.1.2.7 Clock, Reset, and Misc

The PWRCTL_POL is left unconnected which results in active high power enable (PWRCTL1, PWRCTL2, PWRCTL3, and PWRCTL4) for a USB VBUS power switch. The 1 µF capacitor on the GRSTN pin can only be used if the VDD11 supply is stable before the VDD33 supply. The depending on the supply ramp of the two supplies the capacitor may have to be adjusted.

TUSB8041 clock_reset_misc_sllsee4.gif Figure 11. Clock, Reset, and Misc

9.2.1.2.8 TUSB8041 Power Implementation

TUSB8041 pwr_imp_sllsee4.gif Figure 12. TUSB8041 Power Implementation

9.2.1.3 Application Curves

TUSB8041 eye_us_sllsee4.gif
Figure 13. Upstream Port
TUSB8041 eye_ds2_sllsee4.gif
Figure 15. Downstream Port 2
TUSB8041 eye_ds4_sllsee4.gif
Figure 17. Downstream Port 4
TUSB8041 eye_hs_ds1_sllsee4.gif
Figure 19. High-Speed Downstream Port 1
TUSB8041 eye_hs_ds3_sllsee4.gif
Figure 21. High-Speed Downstream Port 3
TUSB8041 eye_ds1_sllsee4.gif
Figure 14. Downstream Port 1
TUSB8041 eye_ds3_sllsee4.gif
Figure 16. Downstream Port 3
TUSB8041 eye_hs_us_sllsee4.gif
Figure 18. High-Speed Upstream Port
TUSB8041 eye_hs_ds2_sllsee4.gif
Figure 20. High-Speed Downstream Port 2
TUSB8041 eye_hs_ds4_sllsee4.gif
Figure 22. High-Speed Downstream Port 4