JAJSGI7F August   2012  – November 2018 DS125BR800

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      代表的なアプリケーション
  4. 4 改訂履歴
  5. 5 概要（続き）
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 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 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
    3. 8.3 Feature Description
      1. 8.3.1 4-Level Input Configuration Guidelines
      2. 8.3.2 PCIe Signal Integrity
        1. 8.3.2.1 RX-Detect in SAS/SATA (up to 6 Gbps) Applications
          1. 8.3.2.1.1 Signal Detect Control for Datarates above 8 Gbps
        2. 8.3.2.2 MODE Operation with SMBus Registers
    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 SMBus Master Mode
      2. 8.5.2 Transfer of Data Via the SMBus
      3. 8.5.3 System Management Bus (SMBus) and Configuration Registers
      4. 8.5.4 SMBus Transactions
      5. 8.5.5 Writing a Register
      6. 8.5.6 Reading a Register
    6. 8.6 Register Maps
  9. 9 Application and Implementation
    1. 9.1 Application Information
    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
    2. 11.2 Layout Example
  12. 12デバイスおよびドキュメントのサポート
    1. 12.1 ドキュメントのサポート
      1. 12.1.1 関連資料
    2. 12.2 ドキュメントの更新通知を受け取る方法
    3. 12.3 商標
    4. 12.4 静電気放電に関する注意事項
    5. 12.5 Glossary
  13. 13メカニカル、パッケージ、および注文情報

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

10.1 3.3-V or 2.5-V Supply Mode Operation

The DS125BR800 has an optional internal voltage regulator to provide the 2.5-V supply to the device. In 3.3-V mode operation, the VIN pin = 3.3 V is used to supply power to the device. The internal regulator will provide the 2.5 V to the VDD pins of the device and a 0.1-µF cap is needed at each of the 5 VDD pins for power supply de-coupling (total capacitance should be ≤0.5 µF), and the VDD pins should be left open. The VDD_SEL pin must be tied to GND to enable the internal regulator. In 2.5-V mode operation, the VIN pin should be left open and 2.5-V supply must be applied to the 5 VDD pins to power the device. The VDD_SEL pin must be left open (no connect) to disable the internal regulator.

The DS125BR800 has an optional internal voltage regulator to provide the 2.5 V supply to the device. In 3.3-V Mode operation, the VIN pin = 3.3 V is used to supply power to the device. The internal regulator will provide the 2.5 V to the VDD pins of the device and a 0.1-µF cap is needed at each of the 5 VDD pins for power supply decoupling (total capacitance should be ≤0.5 µF), and the VDD pins should be left open. The VDD_SEL pin must be tied to GND to enable the internal regulator. In 2.5-V Mode operation, the VIN pin should be left open and 2.5-V supply must be applied to the 5 VDD pins to power the device. The VDD_SEL pin must be left open (no connect) to disable the internal regulator.

DS125BR800 30201606.gifFigure 26. 3.3-V or 2.5-V Supply Connection Diagram