SLVSJO4 August   2025 SN74AHCT540-Q1

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
    5. 5.5 Electrical Characteristics
    6. 5.6 Switching Characteristics
    7. 5.7 Noise Characteristics
    8. 5.8 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Balanced CMOS 3-State Outputs
      2. 7.3.2 TTL-Compatible CMOS Inputs
      3. 7.3.3 Wettable Flanks
      4. 7.3.4 Clamp Diode Structure
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Typical Application
        1. 8.1.1.1 Design Requirements
          1. 8.1.1.1.1 Power Considerations
          2. 8.1.1.1.2 Input Considerations
          3. 8.1.1.1.3 Output Considerations
        2. 8.1.1.2 Detailed Design Procedure
        3. 8.1.1.3 Application Curves
    2. 8.2 Power Supply Recommendations
    3. 8.3 Layout
      1. 8.3.1 Layout Guidelines
      2. 8.3.2 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

3 Description

The SN74AHCT540-Q1 contains eight inverters with 3-state outputs. The 540 function has the same functionality as the 240 function and has a flow-through pinout. The active low output enable pins (OE1 and OE2) control all eight channels, and are configured so that both must be low for the outputs to be active.

Device Information
PART NUMBER PACKAGE(1) PACKAGE SIZE(2) BODY SIZE(3)
SN74AHCT540-Q1 PW (TSSOP, 20) 6.5mm × 6.4mm 6.5mm x 4.4mm
DGS (VSSOP, 20) 5.1mm × 4.9mm 5.1mm × 3.0mm
RKS (VQFN, 20) 4.5mm × 2.5mm 4.5mm × 2.5mm
(1) For more information, see Mechanical, Packaging, and Orderable Information.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
(3) The body size (length × width) is a nominal value and does not include pins.
SN74AHCT540-Q1 Functional Block Diagram Functional Block Diagram