SCDS300D July   2010  – August 2016 TS3USB221A-Q1

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  Electrical Characteristics
    6. 6.6  Dynamic Electrical Characteristics: VCC = 3.3 V
    7. 6.7  Dynamic Electrical Characteristics: VCC = 2.5 V
    8. 6.8  Switching Characteristics: VCC = 3.3 V
    9. 6.9  Switching Characteristics: VCC = 2.5 V
    10. 6.10 Typical Characteristics
  7. Parameter Measurement Information
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Low Power Mode
    4. 8.4 Device Functional Modes
  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
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Community Resource
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

9.1 Application Information

There are many USB applications in which the USB hubs or controllers have a limited number of USB I/Os. The TS3USB221A-Q1 solution can effectively expand the limited USB I/Os by switching between multiple USB buses to interface them to a single USB hub or controller.

9.2 Typical Application

TS3USB221A-Q1 typicalapplicationtsts3usb221a_q1.gif Figure 17. Application Schematic

9.2.1 Design Requirements

Design requirements of the USB 1.0,1.1, and 2.0 standards should be followed.

TI recommends pulling the digital control pins S and OE up to VCC or down to GND to avoid undesired switch positions that could result from the floating pin.

9.2.2 Detailed Design Procedure

The TS3USB221A-Q1 can be properly operated without any external components. However, TI recommends connecting unused pins to ground through a 50-Ω resistor to prevent signal reflections back into the device.

9.2.3 Application Curves

TS3USB221A-Q1 eyepattern_cds277.gif Figure 18. Eye Pattern: 480-Mbps USB Signal With No Switch (Through Path)
TS3USB221A-Q1 eyepattern_no_cds277.gif Figure 20. Eye Pattern: 480-Mbps USB Signal With Switch NO Path
TS3USB221A-Q1 eyepattern_nc_cds277.gif Figure 19. Eye Pattern: 480-Mbps USB Signal With Switch NC Path