SLVSKN5 November   2025 SN74AHC3G99

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4.   4
  5. 3 Description
  6. 4 Pin Configuration and Functions
  7. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Switching Characteristics
    7. 5.7 Noise Characteristics
    8. 5.8 Typical Characteristics
  8. 6 Parameter Measurement Information
  9. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Combinatorial Logic Configurations
    4. 7.4 Feature Description
      1. 7.4.1 Balanced CMOS 3-State Outputs
      2. 7.4.2 CMOS Schmitt-Trigger Inputs
      3. 7.4.3 Clamp Diode Structure
    5. 7.5 Device Functional Modes
  10. 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 Power Considerations
        2. 8.2.1.2 Input Considerations
        3. 8.2.1.3 Output 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
      2. 8.4.2 Layout Example
  11. 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
  12. 10Revision History
  13. 11Mechanical, Packaging, and Orderable Information

7.5 Device Functional Modes

Table 7-1 lists the functional modes of the SN74AHC3G99.

Table 7-1 Function Table
INPUTS(1) OUTPUTS(2)

Y
OE D C B A
L L L L L L
L L L L H H
L L L H L L
L L L H H H
L L H L L L
L L H L H L
L L H H L H
L L H H H H
L H L L L H
L H L L H L
L H L H L H
L H L H H L
L H H L L H
L H H L H H
L H H H L L
L H H H H L
H X X X X Z
(1) H = High Voltage level, L = Low Voltage level, X = Don't care
(2) H = Driving high state, L = Driving low state, Z = High-impedance state