SLLSFC6B November   2021  â€“ July 2022 ISOUSB111

PRODUCTION DATA  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Power Ratings
    6. 6.6  Insulation Specifications
    7. 6.7  Safety-Related Certifications
    8. 6.8  Safety Limiting Values
    9. 6.9  Electrical Characteristics
    10. 6.10 Switching Characteristics
    11. 6.11 Insulation Characteristics Curves
    12. 6.12 Typical Characteristics
  7. Parameter Measurement Information
    1. 7.1 Test Circuits
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Power Supply Options
      2. 8.3.2 Power Up
      3. 8.3.3 Symmetric Operation, Dual-Role Port and Role-Reversal
      4. 8.3.4 Connect and Speed Detection
      5. 8.3.5 Disconnect Detection
      6. 8.3.6 Reset
      7. 8.3.7 LS/FS Message Traffic
      8. 8.3.8 L2 Power Management State (Suspend) and Resume
      9. 8.3.9 L1 Power Management State (Sleep) and Resume
    4. 8.4 Device Functional Modes
  9. Power Supply Recommendations
  10. 10Application and Implementation
    1. 10.1 Typical Application
      1. 10.1.1 Isolated Host or Hub
      2. 10.1.2 Isolated Peripheral - Self-Powered
      3. 10.1.3 Isolated Peripheral - Bus-Powered
      4. 10.1.4 Application Curve
        1. 10.1.4.1 Insulation Lifetime
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Layout Example
      2. 11.1.2 PCB Material
  12. 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
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information
    1. 13.1 Tape and Reel Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

L2 Power Management State (Suspend) and Resume

The ISOUSB111 device supports Suspend low power state, also called L2 state in the USB 2.0 Link Power Management engineering change notice (ECN). Suspend mode is detected if the bus stays in the LS/FS idle state for more than 3 ms. When Suspend is detected from LS and FS idle state, the ISOUSB111 continues in the LS or FS idle state, at the same time reducing internal power consumption. The transition to the L2 low-power mode is completed within 10 ms.

Exit from L2 occurs through either Resume signaling from the host, on the upstream facing side of ISOUSB111, or Remote Wake signaling from the peripheral on the downstream facing side of ISOUSB111 followed by Resume signaling from the host/hub on the upstream facing side. Start of Resume or Wake are signaled by a ‘K’ state by the host or the device respectively. The end of resume is signalled by the host by driving two low-speed bit times of SE0 followed by a 'J' state. ISOUSB111 is able to replicate the resume and wake signaling appropriately both upstream and downstream. After Resume/Wake signaling the device returns to LS or FS idle state depending on the state it was in before entering the L2 state.