ZHCSUM5 February   2024 TUSB211A-Q1

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Switching Characteristics
    7. 5.7 Timing Requirements
    8. 5.8 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 High-Speed EQ
    4. 6.4 Device Functional Modes
      1. 6.4.1 Low-Speed (LS) Mode
      2. 6.4.2 Full-Speed (FS) Mode
      3. 6.4.3 High-Speed (HS) Mode
      4. 6.4.4 High-Speed Downstream Port Electrical Compliance Test Mode
      5. 6.4.5 Shutdown Mode
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Test Procedure to Construct USB High-Speed Eye Diagram
          1. 7.2.2.1.1 For a Host Side Application
          2. 7.2.2.1.2 For a Device Side Application
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 接收文档更新通知
    2. 8.2 支持资源
    3. 8.3 Trademarks
    4. 8.4 静电放电警告
    5. 8.5 术语表
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

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机械数据 (封装 | 引脚)
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散热焊盘机械数据 (封装 | 引脚)
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7.2.2 Detailed Design Procedure

The best EQ setting is dependent upon the signal chain loss characteristics of the target platform. The recommendation is to start with EQ Level 0, and then increment to EQ Level 1, and so on.

For the TUSB211A-Q1 to recognize any change to the EQ setting, the RSTN pin must be toggled. This is because the EQ pin is latched on power up and the pin is ignored thereafter.

Placement of the device is also dependent on the application goal. Table 7-2 provides TI recommendations.

Table 7-2 Platform Placement Guideline
PLATFORM GOALSUGGESTED TUSB211A-Q1 PLACEMENT
Pass USB Near End Mask at the receptacleClose to measurement point (connector)
Pass USB Far End Eye Mask at the plugClose to USB PHY
Cascade multiple TUSB211A-Q1s to improve device enumerationMidway between each USB interconnect
Table 7-3 Table of Recommended Settings
EQ settings(1) for channel loss
Pre-channel cable length (Between USB PHY and TUSB211A-Q1) EQ
0-3 meter Level 0
2-5 meter Level 1
Post-channel cable length (Between TUSB211A-Q1 and inter-connect) EQ
0-2 meter Level 0
1-4 meter Level 1
(1) These parameters are starting values for different cable lengths. Further tuning might be required based on specific host or device as well as cable length and loss profile.