SCLS255N December   1995  – February 2024 SN54AHC74 , SN74AHC74

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  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 — SN74AHC74
    5. 5.5  Electrical Characteristics
    6. 5.6  Timing Requirements — VCC = 3.3 V ± 0.3 V
    7. 5.7  Timing Requirements — VCC = 5 V ± 0.5 V
    8. 5.8  Switching Characteristics — VCC = 3.3 V ± 0.5 V
    9. 5.9  Switching Characteristics — VCC = 5 V ± 0.5 V
    10. 5.10 Noise Characteristics
    11. 5.11 Operating Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Device Functional Modes
  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 Input Considerations
        2. 8.2.1.2 Output Considerations
        3. 8.2.1.3 Power Considerations
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
        1. 8.4.1.1 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • J|14
  • FK|20
  • W|14
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.3 Device Functional Modes

Table 7-1 shows the function table for each input and output.

Table 7-1 Function Table (Each Flip-Flop)
INPUTSOUTPUTS
PRECLRCLKDQQ
LHXXHL
HLXXLH
LLXXH(1)H(1)
HH↑HHL
HH↑LLH
HHLXQ0Q0
(1) This configuration is unstable; that is, it does not persist when PRE or CLR returns to its inactive (high) level.