SLLSEW5 April 2017 TUSB8044

PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Description (Continued)
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1Absolute Maximum Ratings
    2. 7.2ESD Ratings
    3. 7.3Recommended Operating Conditions
    4. 7.4Thermal Information
    5. 7.5Electrical Characteristics, 3.3-V I/O
    6. 7.6Timing Requirements, Power-Up
    7. 7.7Hub Input Supply Current
  8. Detailed Description
    1. 8.1Overview
    2. 8.2Functional Block Diagram
    3. 8.3Feature Description
      1. 8.3.1Battery Charging Features
      2. 8.3.2 USB Power Management
      3. 8.3.3I2C Programming Support Using Internal Hid to I2C Interface
        1. 8.3.3.1SET REPORT (Output)
        2. 8.3.3.2GET REPORT (Feature)
        3. 8.3.3.3GET REPORT (Input)
      4. 8.3.4USB2.0 Billboard
      5. 8.3.5One Time Programmable (OTP) Configuration
      6. 8.3.6Clock Generation
      7. 8.3.7Crystal Requirements
      8. 8.3.8Input Clock Requirements
      9. 8.3.9Power-Up and Reset
    4. 8.4Device Functional Modes
      1. 8.4.1External Configuration Interface
      2. 8.4.2I2C EEPROM Operation
      3. 8.4.3Port Configuration
      4. 8.4.4SMBus Slave Operation
    5. 8.5Register 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. 8.5.10Port Used Configuration Register
      11. 8.5.11Device Configuration Register 2
      12. 8.5.12USB 2.0 Port Polarity Control Register
      13. 8.5.13UUID Registers
      14. 8.5.14Language ID LSB Register
      15. 8.5.15Language ID MSB Register
      16. 8.5.16Serial Number String Length Register
      17. 8.5.17Manufacturer String Length Register
      18. 8.5.18Product String Length Register
      19. 8.5.19Device Configuration Register 3
      20. 8.5.20USB 2.0 Only Port Register
      21. 8.5.21Billboard SVID LSB
      22. 8.5.22Billboard SVID MSB
      23. 8.5.23Billboard PID LSB
      24. 8.5.24Billboard PID MSB
      25. 8.5.25Billboard Configuration
      26. 8.5.26Billboard String1 Length
      27. 8.5.27Billboard String2 Length
      28. 8.5.28Serial Number String Registers
      29. 8.5.29Manufacturer String Registers
      30. 8.5.30Product String Registers
      31. 8.5.31Additional Feature Configuration Register
      32. 8.5.32SMBus Device Status and Command Register
      33. 8.5.33Billboard String1_2
  9. Applications and Implementation
    1. 9.1Application Information
    2. 9.2Typical Application
      1. 9.2.1Discrete USB Hub Product
        1. 9.2.1.1Design Requirements
        2. 9.2.1.2Detailed 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. 9.2.1.2.10TUSB8044 Power Implementation
        3. 9.2.1.3Application Curves
  10. 10Power Supply Recommendations
    1. 10.1TUSB8044 Power Supply
    2. 10.2Downstream Port Power
    3. 10.3Ground
  11. 11Layout
    1. 11.1Layout Guidelines
      1. 11.1.1Placement
      2. 11.1.2Package Specific
      3. 11.1.3Differential Pairs
    2. 11.2Layout Examples
      1. 11.2.1Upstream Port
      2. 11.2.2Downstream Port
  12. 12Device and Documentation Support
    1. 12.1Receiving Notification of Documentation Updates
    2. 12.2Community Resources
    3. 12.3Trademarks
    4. 12.4Electrostatic Discharge Caution
    5. 12.5Glossary
  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
Orderable Information

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.