ZHCSP28B July   2021  – October 2022 SN74HCS244

PRODMIX  

  1. 特性
  2. 应用
  3. 说明
  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 Switching Characteristics
    7. 6.7 Operating Characteristics
    8. 6.8 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 Balanced CMOS 3-State Outputs
      2. 8.3.2 Balanced CMOS Push-Pull Outputs
      3. 8.3.3 Open-Drain CMOS Outputs
      4. 8.3.4 CMOS Schmitt-Trigger Inputs
      5. 8.3.5 TTL 兼容型 CMOS 输入
      6. 8.3.6 Standard CMOS Inputs
      7. 8.3.7 Clamp Diode Structure
      8. 8.3.8 Wettable Flanks
    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
        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 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 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 Electrostatic Discharge Caution
    6. 12.6 术语表
  13. 13Mechanical, Packaging, and Orderable Information

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Parameter Measurement Information

Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tt < 2.5 ns.

For clock inputs, fmax is measured when the input duty cycle is 50%.

The outputs are measured one at a time with one input transition per measurement.

GUID-EB3CF292-AF1E-41A1-A556-76EDB85F7F6F-low.gif
(1) CL includes probe and test-fixture capacitance.
Figure 7-1 Load Circuit for 3-State Outputs
GUID-AC96879B-051A-49E4-8FE0-77EE52991418-low.gifFigure 7-3 Voltage Waveforms Propagation Delays
GUID-535BFE0F-9D7B-4CA6-85AB-D09CD11F52EA-low.gif
(1) The greater between tPLH and tPHL is the same as tpd.
Figure 7-2 Voltage Waveforms Propagation Delays
GUID-20200713-CA0I-ZTM5-PTJB-WD0LZ8VNG7PG-low.gif
(1) The greater between tr and tf is the same as tt.
Figure 7-4 Voltage Waveforms, Input and Output Transition Times