SCLS420H June   1998  – January 2025 SN54AHCT123A , SN74AHCT123A

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 Switching Characteristics
    8. 4.8 Operating Characteristics
    9. 4.9 Input/Output Timing Diagram
  6. 5 Parameter Measurement Information
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 CMOS Schmitt-Trigger Inputs
      2. 6.3.2 TTL-Compatible CMOS Inputs
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Caution in Use
      2. 7.1.2 Power-down Considerations
      3. 7.1.3 Output Pulse Duration
      4. 7.1.4 Retriggering Data
    2. 7.2 Power Supply Recommendations
    3. 7.3 Layout
      1. 7.3.1 Layout Guidelines
      2. 7.3.2 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

7.3.2 Layout Example

SN54AHCT123A SN74AHCT123A Example Trace Corners for Improved Signal Integrity Figure 7-10 Example Trace Corners for Improved Signal Integrity
SN54AHCT123A SN74AHCT123A Example Bypass Capacitor Placement for TSSOP and Similar PackagesFigure 7-11 Example Bypass Capacitor Placement for TSSOP and Similar Packages
SN54AHCT123A SN74AHCT123A Example Bypass Capacitor Placement for SOT, SC70 and Similar PackagesFigure 7-13 Example Bypass Capacitor Placement for SOT, SC70 and Similar Packages
SN54AHCT123A SN74AHCT123A Example Bypass Capacitor Placement for WQFN and Similar PackagesFigure 7-12 Example Bypass Capacitor Placement for WQFN and Similar Packages
SN54AHCT123A SN74AHCT123A Example Damping Resistor Placement for Improved Signal Integrity Figure 7-14 Example Damping Resistor Placement for Improved Signal Integrity