ZHCSLQ0B August   2020  – November 2023 TCA4307

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
    7. 5.7 Switching Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Hot bus insertion
      2. 7.3.2 Pre-charge voltage
      3. 7.3.3 Rise time accelerators
      4. 7.3.4 Bus ready output indicator
      5. 7.3.5 Powered-off high impedance for I2C and I/O pins
      6. 7.3.6 Supports clock stretching and arbitration
      7. 7.3.7 Stuck bus recovery
    4. 7.4 Device Functional Modes
      1. 7.4.1 Start-up and precharge
      2. 7.4.2 Bus idle
      3. 7.4.3 Bus active
      4. 7.4.4 Bus stuck
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
        1. 8.2.1.1 Series connections
        2. 8.2.1.2 Multiple connections to a common node
        3. 8.2.1.3 Propagation delays
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
      4. 8.2.4 Typical Application on a Backplane
        1. 8.2.4.1 Design Requirements
        2. 8.2.4.2 Detailed Design Procedure
    3. 8.3 Power Supply Recommendations
      1. 8.3.1 Power Supply Best Practices
      2. 8.3.2 Power-on Reset Requirements
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 支持资源
    3. 9.3 Trademarks
    4. 9.4 静电放电警告
    5. 9.5 术语表
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

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7.4.4 Bus stuck

Once a stuck bus condition has been detected on SDAOUT or SCLOUT, the TCA4307 disconnects the bus and begins a sequence to attempt to recover the bus. First, the OUT side is disconnected from the IN side. READY will go low to signal that the bus is disconnected. Second, the TCA4307 will begin generating clocks on SCLOUT, up to 16. It will constantly monitor the state of SDAOUT to see if it has been released. Clocking will continue until 16 clocks are generated, or the SDAOUT releases. Once the SDAOUT releases, the TCA4307 will stop clocking and will generate a stop condition to terminate the recovery sequence. The last step is to go back to the bus-idle state and wait for an idle bus on both sides or a stop condition to ensure it's safe to connect the bus.
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