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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8.1 Overview

The DS280MB810 is an eight-channel multi-rate linear repeater with integrated signal conditioning and cross-point. The eight channels operate independently from one another. Each channel includes a continuous-time linear equalizer (CTLE), multiplexer, and a linear output driver, which compensate for the presence of a dispersive transmission channel between the source transmitter and the final receiver.

Between each group of two adjacent channels (i.e. between channels 0–1, 2–3, 4–5, and 6–7) is a full 2x2 cross-point switch. This allows multiplexing and de-multiplexing or fanout applications for failover redundancy, as well as cross-over applications to aid PCB routing.

All receive channels on the DS280MB810 are AC-coupled with physical AC coupling capacitors (220 nF ±20%) on the package substrate. This ensures input common mode voltage compatibility with all link partner transmitters and eliminates the need for AC coupling capacitors on the system PCB, thereby saving cost and greatly reducing PCB routing complexity.

The DS280MB810 is configurable through a single SMBus port. The DS280MB810 can also act as an SMBus master to configure itself from an EEPROM.

The sections which follow describe the functionality of various circuits and features within the DS280MB810. For more information about how to program or operate these features refer to the DS280MB810 Programming Guide.
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