SLLSEW5 April   2017 TUSB8044

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 I2C Programming Support Using Internal Hid to I2C Interface
        1. 8.3.3.1 SET REPORT (Output)
        2. 8.3.3.2 GET REPORT (Feature)
        3. 8.3.3.3 GET REPORT (Input)
      4. 8.3.4 USB2.0 Billboard
      5. 8.3.5 One Time Programmable (OTP) Configuration
      6. 8.3.6 Clock Generation
      7. 8.3.7 Crystal Requirements
      8. 8.3.8 Input Clock Requirements
      9. 8.3.9 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 Port Configuration
      4. 8.4.4 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 Device Configuration Register 3
      20. 8.5.20 USB 2.0 Only Port Register
      21. 8.5.21 Billboard SVID LSB
      22. 8.5.22 Billboard SVID MSB
      23. 8.5.23 Billboard PID LSB
      24. 8.5.24 Billboard PID MSB
      25. 8.5.25 Billboard Configuration
      26. 8.5.26 Billboard String1 Length
      27. 8.5.27 Billboard String2 Length
      28. 8.5.28 Serial Number String Registers
      29. 8.5.29 Manufacturer String Registers
      30. 8.5.30 Product String Registers
      31. 8.5.31 Additional Feature Configuration Register
      32. 8.5.32 SMBus Device Status and Command Register
      33. 8.5.33 Billboard String1_2
  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  PD Controller and EEPROM Implementation
          8. 9.2.1.2.8  DisplayPort Implementation
          9. 9.2.1.2.9  Clock, Reset, and Misc
          10. 9.2.1.2.10 TUSB8044 Power Implementation
        3. 9.2.1.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 TUSB8044 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 Receiving Notification of Documentation Updates
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • RGC|64
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5 Description (Continued)

When the upstream port is connected to an electrical environment that only supports full-speed/low-speed connections, SuperSpeed USB and high-speed connectivity are disabled on the downstream ports.

The TUSB8044 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.

The TUSB8044 downstream ports provide support for battery charging applications by providing Battery Charging Downstream Port (CDP) handshaking support. It also supports a Dedicated Charging Port (DCP) mode when the upstream port is not connected. The DCP mode supports USB devices which support with the USB Battery Charging, Galaxy Charging, and Chinese Telecommunications Industry Standard YD/T 1591-2009. In addition, an automatic mode provides transparent support for BC devices and devices supporting Divider Mode charging solutions when the upstream port unconnected. In addition when upstream port is unconnected, the TUSB8044 supports the divider charging port modes (ACPx modes) and an automatic transition through all modes, starting with ACP3 and ending in DCP.

Integrated in the TUSB8044 is a USB2.0 Billboard device which complies to the "USB Device Class Definition for Billboard Devices Version 1.1" specification. The billboard device is attached to the highest number downstream port of the TUSB8044 USB 2.0 hub. The purpose of the billboard is to communicate Alternate Mode status to the host system. The TUSB8044 supports only one Alternate mode.

The TUSB8044 provides pin strap configuration for some features including battery charging support, and also provides customization though OTP ROM, I2C EEPROM, or via an I2C/SMBus slave interface for PID, VID, and custom port and phy configurations. Custom string support is also available when using an I2C EEPROM or the I2C/SMBus slave interface.

The TUSB8044 supports programming of an attached EEPROM through its internal USB HID to I2C interface.

The device is available in a 64-pin RGC package and is offered in a commercial version for operation over the temperature range of 0°C to 70°C.