JAJSK23 September   2021 TUSB217A-Q1

PRODUCTION DATA  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
  4. 4 Revision History
  5. 5 Device Comparison
  6. 6 Pin Configuration and 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 Switching Characteristics
    7. 7.7 Timing Requirements
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 High-Speed Boost
      2. 8.3.2 RX Sensitivity
    4. 8.4 Device Functional Modes
      1. 8.4.1 Low-Speed (LS) Mode
      2. 8.4.2 Full-Speed (FS) Mode
      3. 8.4.3 High-Speed (HS) Mode
      4. 8.4.4 High-Speed Downstream Port Electrical Compliance Test Mode
      5. 8.4.5 Shutdown Mode
      6. 8.4.6 I2C Mode
      7. 8.4.7 BC 1.2 Battery Charging Controller
    5. 8.5 TUSB217A-Q1 Registers
  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
        1. 9.2.2.1 Test Procedure to Construct USB High-speed Eye Diagram
          1. 9.2.2.1.1 For a Host Side Application
          2. 9.2.2.1.2 For a Device Side Application
      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 ドキュメントの更新通知を受け取る方法
    2. 12.2 サポート・リソース
    3. 12.3 Trademarks
    4. 12.4 静電気放電に関する注意事項
    5. 12.5 用語集
  13. 13Mechanical, Packaging, and Orderable Information

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 Power Supply Recommendations

On power up, the interaction of the RSTN pin and power on ramp could result in digital circuits not being set correctly. The device should not be enabled until the power on ramp has settled to minimum recommended supply voltage or higher to ensure a correct power on reset of the digital circuitry. If RSTN cannot be held low by microcontroller or other circuitry until the power on ramp has settled, then an external capacitor from the RSTN pin to GND is required to hold the device in the low power reset state.

The RC time constant should be larger than five times of the power on ramp time (0 to VCC). With a typical internal pullup resistance of 500 kΩ, the recommended minimum external capacitance is calculated as:

Equation 1. [Ramp Time x 5] ÷ [500 kΩ]