SCHS326A January   2003  – December 2024 CD54AC109 , CD74AC109

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Description
  4. 3 Pin Configuration and Functions
  5. 4 Specifications
    1. 4.1  Absolute Maximum Ratings
    2. 4.2  ESD Ratings
    3. 4.3  Recommended Operating Conditions
    4. 4.4  Thermal Information
    5. 4.5  Electrical Characteristics
    6. 4.6  Timing Requirements
    7. 4.7  Timing Requirements
    8. 4.8  Timing Requirements
    9. 4.9  Switching Characteristics
    10. 4.10 Switching Characteristics
    11. 4.11 Switching Characteristics
    12. 4.12 Operating Characteristics
  6. 5 Parameter Measurement Information
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Power Supply Recommendations
    2. 7.2 Layout
      1. 7.2.1 Layout Guidelines
      2. 7.2.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

6.3 Device Functional Modes

Table 6-1 Function Table (Each Flip-flop)
INPUTS OUTPUTS
PRE CLR CLK J K Q Q
L H X X X H L
H L X X X L H
L L X X X H(1) H(1)
H H ↑ L L L H
H H ↑ H L Toggle
H H ↑ L H Q0 Q0
H H ↑ H H H L
H H L X X Q0 Q0
(1) Unpredictable and unstable condition if both PRE and CLR go low simultaneously