ZHCSKI5D November   2019  – December 2021 SN74HCS74

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 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 Switching Characteristics
    7. 6.7 Timing Characteristics
    8. 6.8 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Balanced CMOS Push-Pull Outputs
      2. 8.3.2 CMOS Schmitt-Trigger Inputs
      3. 8.3.3 Clamp Diode Structure
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
        1. 9.2.1.1 Power Considerations
        2. 9.2.1.2 Input Considerations
        3. 9.2.1.3 Output Considerations
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 接收文档更新通知
    3. 12.3 支持资源
    4. 12.4 Trademarks
    5. 12.5 静电放电警告
    6. 12.6 术语表
  13. 13Mechanical, Packaging, and Orderable Information

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9.2.3 Application Curve

Circuit response without RC debounce
Vin := CLK input, Vout := Q output illustrates an example of a single button press bouncing and causing the output to toggle multiple times. This will cause issues in the desired application. Circuit response with RC debounce
Vin := CLK input, Vout := Q output illustrates 4 button presses with an added debounce circuit, fixing the unwanted toggling and allowing for proper toggle switch operation.

GUID-34900C61-EAF4-43D0-97B2-16A5A9496E32-low.gifFigure 9-2 Circuit response without RC debounce
Vin := CLK input, Vout := Q output
GUID-75C286BC-64C9-4EF4-989A-9D2C545A65F2-low.gifFigure 9-3 Circuit response with RC debounce
Vin := CLK input, Vout := Q output