SLLSFC6B November   2021  – 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

Isolated Host or Hub

Figure 10-1 shows an application for isolating a host or a hub using ISOUSB111. In this example, on the microntroller side, V3P3V1 and VBUS1 are together connected to an external 3.3-V supply. On the connector side, the VBUS from the USB connector is connected to VBUS2 and the V3P3V2 supply is generated using the internal 3.3-V LDO.

Decoupling capacitors are placed next to ISOUSB111 according to the recommendations provided in the Power Supply Recommendations section. An isolated DC-DC converter (such as the SN6505) is to provide power to the VBUS using the 3.3-V local supply. Note that, for a host or hub, the USB standard requires a 120-μF capacitor to be placed on the VBUS so as to be able provide in-rush current when a downstream peripheral is attached. In addition, a 100-nF capacitor is recommended close to the VBUS pin to handle tranisent currents.

ESD diodes with low capacitance and low dynamic resistance, such as PESD5V0C1USF, may be placed on D+ and D- lines. A ferrite bead, with dc resistance less than 100 mΩ, may be optionally placed between VBUS pin of the connector and the VBUS pin of ISOUSB111, as shown in the figure, to suppress transients such as ESD.

Figure 10-1 Isolated Host or Hub with ISOUSB111.