SNLS334G April   2011  – January 2015 DS80PCI800

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Ratings
    4. 6.4 Electrical Characteristics
    5. 6.5 Electrical Characteristics — Serial Management Bus Interface
    6. 6.6 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 4-Level Input Configuration Guidelines
    4. 8.4 Device Functional Modes
      1. 8.4.1 Pin Control Mode
      2. 8.4.2 SMBUS Mode
    5. 8.5 Programming
      1. 8.5.1 System Management Bus (SMBus) and Configuration Registers
      2. 8.5.2 Transfer of Data Through the SMBus
      3. 8.5.3 Writing a Register
      4. 8.5.4 Reading a Register
      5. 8.5.5 SMBus Master Mode
    6. 8.6 Register Maps
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 DS80PCI800 versus DS80PCI810
      2. 9.1.2 Signal Integrity in PCIe Applications
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 3.3-V or 2.5-V Supply Mode Operation
    2. 10.2 Power Supply Bypassing
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 PCB Layout Considerations for Differential Pairs
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

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1 Features

  • Comprehensive Family, Proven System Interoperability
    • DS80PCI102 : x1 PCIe
      Gen-1, Gen-2, and Gen-3
    • DS80PCI402 : x4 PCIe
      Gen-1, Gen-2, and Gen-3
    • DS80PCI800 : x8/x16 PCIe
      Gen-1, Gen-2, and Gen-3
  • Automatic Rate Detect and Adaptation to Gen-1/2/3 Speeds
  • Seamless Support for Gen-3 Transmit FIR Handshake
  • Receiver EQ (up to 36 dB), Transmit De-Emphasis (up to 12 dB)
  • Adjustable Transmit VOD: 0.8 to 1.3 Vp-p (Pin Mode)
  • 0.2 UI of Residual Deterministic Jitter at 8 Gbps After 40 Inches of FR4 or 10 m 30-awg PCIe Cable
  • Low Power Dissipation With Ability to Turn Off Unused Channels: 65 mW/Channel
  • Automatic Receiver Detect (Hot-Plug)
  • Multiple Configuration Modes: Pins/SMBus/Direct-EEPROM Load
  • Flow-Thru Pinout: 54-Pin WQFN (10-mm ×
    5.5-mm, 0.5-mm Pitch)
  • Single Supply Voltage: 2.5 or 3.3 V (Selectable)
  • ±3 kV HBM ESD Rating
  • −40°C to 85°C Operating Temperature Range

2 Applications

  • PCI Express Gen-1, Gen-2, and Gen-3

3 Description

The DS80PCI800 is a low-power, 8-channel repeater with 4-stage input equalization, and an output de-emphasis driver to enhance the reach of PCI-Express serial links in board-to-board or cable interconnects. This device is ideal for higher density x8 and x16 PCI-Express configurations, and it automatically detects and adapts to Gen-1, Gen-2, and Gen-3 data rates for easy system upgrade.

DS80PCI800 offers programmable transmit de-emphasis (up to 12 dB), transmit VOD (up to
1300 mVp-p) and receive equalization (up to 36 dB) to enable longer distance transmission in lossy copper cables (10 meters or more), or backplanes (40 inches or more) with multiple connectors. The receiver can open an input eye that is completely closed due to inter-symbol interference (ISI) introduced by the interconnect medium.

The programmable settings can be applied easily through pins or software (SMBus/I2C), or can be loaded through an external EEPROM. When operating in the EEPROM mode, the configuration information is automatically loaded on power up, which eliminates the need for an external microprocessor or software driver.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
DS80PCI800 WQFN (54) 10.00 mm × 5.50 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application Block Diagram

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Simplified Schematic Diagram

DS80PCI800_simplified_schematic.gif