SLLSE67I March   2011  – March 2016 TUSB9261

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 DC Electrical Characteristics for 3.3-V Digital I/O
    6. 6.6 SuperSpeed USB Power Consumption
    7. 6.7 High-Speed USB Power Consumption
    8. 6.8 Oscillator Specification
    9. 6.9 Crystal Specification
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Operation
        1. 7.3.1.1 General Functionality
        2. 7.3.1.2 Firmware Support
        3. 7.3.1.3 GPIO/PWM LED Designations
        4. 7.3.1.4 Power-Up and Reset Sequence
      2. 7.3.2 Clock Connections
        1. 7.3.2.1 Clock Source Requirements
        2. 7.3.2.2 Clock Source Selection Guide
    4. 7.4 Device Functional Modes
      1. 7.4.1 VBUS Power
      2. 7.4.2 External Power
      3. 7.4.3 External Voltage Regulator
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 PWM Terminals
        2. 8.2.2.2 JTAG Interface
        3. 8.2.2.3 Voltage Regulator Schematic
        4. 8.2.2.4 SPI
  9. 9 Power Supply Recommendations
    1. 9.1 Digital Supplies 1.1-V and 3.3-V
    2. 9.2 Analog Supplies 1.1-V and 3.3-V
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 High-Speed Differential Routing
      2. 10.1.2 SuperSpeed Differential Routing
      3. 10.1.3 SATA Differential Routing
    2. 10.2 Layout Examples
  11. 11Device and Documentation Support
    1. 11.1 Community Resources
    2. 11.2 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9 Power Supply Recommendations

9.1 Digital Supplies 1.1-V and 3.3-V

The TUSB9261 requires a 1.1-V and 3.3-V digital power source.

The 1.1-V terminals are named VDD11. These terminals supply power to the digital core. The 1.1-V core allows for a significant reduction in both power consumption and logic switching noise.

The 3.3-V terminals are named VDD33 and supply power to most of the input and output cells. Both VDD11 and VDD33 supplies must have 0.1-μF bypass capacitors to VSS (ground) to ensure proper operation. One capacitor per power terminal is sufficient and should be placed as close to the terminal as possible to minimize trace length. TI also recommends smaller value capacitors like 0.01-μF on the digital supply terminals.

When placing and connecting all bypass capacitors, follow high-speed board design rules.

9.2 Analog Supplies 1.1-V and 3.3-V

TI recommends a Pi filter on all analog power terminals to minimize circuit noise. These filters can be combined on a per-rail basis for a total of two (VDDA11 / VDDA11_USB2) + (VDDA33).

Analog power terminals must have a 1-μF and a 10-μF bypass capacitor connected to VSSA (ground) to ensure proper operation. Place the capacitor as close as possible to the associated terminal to minimize trace length. TI also recommends smaller value capacitors such as 0.1-μF and 0.01-μF on the analog supply terminals.