ZHCSKE4C october   2016  – december 2020 DS280MB810

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Revision History
  6. 5 Description (continued)
  7. 6 Pin Configuration and Functions
  8. 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
    6. 7.6 Timing Requirements – Serial Management Bus Interface
    7. 7.7 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Device Data Path Operation
      2. 8.3.2 AC-coupled Receiver Inputs
      3. 8.3.3 Signal Detect
      4. 8.3.4 2-Stage CTLE
      5. 8.3.5 Driver DC Gain Control
      6. 8.3.6 2x2 Cross-point Switch
      7. 8.3.7 Configurable SMBus Address
    4. 8.4 Device Functional Modes
      1. 8.4.1 SMBus Slave Mode Configuration
      2. 8.4.2 SMBus Master Mode Configuration (EEPROM Self Load)
    5. 8.5 Programming
      1. 8.5.1 Transfer of Data with the SMBus Interface
    6. 8.6 Register Maps
      1. 8.6.1 Register Types: Global, Shared, and Channel
      2. 8.6.2 Global Registers: Channel Selection and ID Information
      3. 8.6.3 Shared Registers
      4. 8.6.4 Channel Registers
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Backplane and Mid-Plane Reach Extension
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
      2. 9.2.2 Front-Port Applications
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
        1. 9.2.3.1 Pattern Generator Characteristics
        2. 9.2.3.2 Equalizing Moderate Pre-Channel Loss
        3. 9.2.3.3 Equalizing High Pre-Channel Loss
        4. 9.2.3.4 Equalizing High Pre-Channel Loss and Moderate Post-Channel Loss
    3. 9.3 Initialization Set Up
  11. 10Power Supply Recommendations
  12. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Examples
      1. 11.2.1 Stripline Example
      2. 11.2.2 Microstrip Example
  13. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
  14. 13Mechanical, Packaging, and Orderable Information

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8.3.3 Signal Detect

Each DS280MB810 high speed receiver has a signal detect circuit which monitors the energy level on the inputs. The signal detect circuit will enable the high-speed data path if a signal is detected, or power it off if no signal is detected. By default, this feature is enabled, but can be manually controlled though the SMBus channel registers. This can be useful if it is desired to manually force channels to be disabled. For information on how to manually operate the signal detect circuit refer to the DS280MB810 Programming Guide.
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