SNLS430C October   2012  – August 2014 DS125BR111

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Simplified Schematic
  5. 5 Revision History
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Handling Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Electrical Characteristics — Serial Management Bus Interface
    7. 7.7 Timing Requirements
    8. 7.8 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
      1. 8.2.1 Functional Datapath Blocks
    3. 8.3 Feature Description
    4. 8.4 Device Functional Modes
      1. 8.4.1 Pin Control Mode
      2. 8.4.2 SMBus Mode
      3. 8.4.3 Signal Conditioning Settings
    5. 8.5 Programming
    6. 8.6 Register Maps
      1. 8.6.1 Transfer Of Data Via The SMBus
      2. 8.6.2 SMBus Transactions
      3. 8.6.3 Writing a Register
      4. 8.6.4 Reading a Register
      5. 8.6.5 SMBus Register Information
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Signal Integrity
      2. 9.1.2 RX-Detect in SAS/SATA Applications
      3. 9.1.3 PCIe Applications
        1. 9.1.3.1 RXDET When Using SMBus Modes
    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
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Trademarks
    2. 12.2 Electrostatic Discharge Caution
    3. 12.3 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

1 Features

  • Low 65 mW/Channel (typ) Power Consumption
  • Supports Link Training
  • Supports Out-of-Band (OOB) Signaling
  • Advanced Signal Conditioning I/O
    • Receive CTLE up to 10 dB at 6 GHz
    • Linear Output Driver
    • Output Voltage Range over 1200 mV
  • Programmable via Pin Selection, EEPROM, or SMBus Interface
  • Single Supply Voltage: 2.5 V or 3.3 V
  • −40°C to 85°C Operating Temperature Range
  • Flow-thru Pinout in 4 mm × 4 mm 24-pin Leadless WQFN Package

2 Applications

  • SAS-1/2/3 and SATA-1/2/3
  • PCI Express 1/2/3
  • Other Proprietary Interfaces up to 12.5 Gbps

3 Description

The DS125BR111 is an extremely low power high performance repeater/redriver designed to support 1-lane carrying high speed interface up to 12.5 Gbps. The receiver's continuous time linear equalizer (CTLE) provides a boost of 3-10 dB at 6 GHz in each channel. When operating in SAS-3 or PCIe Gen-3 applications, the DS125BR111 preserves transmit signal characteristics allowing the host controller and the end point to negotiate transmit equalizer coefficients. Transparency to the link training protocol maximizes the flexibility of the physical placement of the device within the interconnect and improves overall channel performance.

The programmable settings can be applied easily via pins, software (SMBus or I2C), or loaded via an external EEPROM. In 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)
DS125BR111 WQFN (24) 4.00mm x 4.00mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

4 Simplified Schematic

111sch_r2.gif