SCLS871B July   2021  – August 2024 SN74HCS240

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5.   5
  6.   6
  7. 4 Pin Configuration and Functions
  8. 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 Operating Characteristics
    8. 5.8 Typical Characteristics
  9. 6 Parameter Measurement Information
  10. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Feature Description
        1. 7.3.1.1 Balanced CMOS 3-State Outputs
        2. 7.3.1.2 Balanced CMOS Push-Pull Outputs
        3. 7.3.1.3 Open-Drain CMOS Outputs
        4. 7.3.1.4 CMOS Schmitt-Trigger Inputs
        5. 7.3.1.5 TTL-Compatible CMOS Inputs
        6. 7.3.1.6 Standard CMOS Inputs
        7. 7.3.1.7 Clamp Diode Structure
    4. 7.4 Device Functional Modes
  11. 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 Curve
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  12. 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
  13. 10Revision History
  14. 11Mechanical, Packaging, and Orderable Information

6 Parameter Measurement Information

Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50Ω, tt < 2.5 ns.

For clock inputs, fmax is measured when the input duty cycle is 50%.

The outputs are measured one at a time with one input transition per measurement.

SN74HCS240 Load Circuit for 3-State Outputs
(1) CL includes probe and test-fixture capacitance.
Figure 6-1 Load Circuit for 3-State Outputs
SN74HCS240 Voltage Waveforms Propagation DelaysFigure 6-3 Voltage Waveforms Propagation Delays
SN74HCS240 Voltage Waveforms Propagation Delays
(1) The greater between tPLH and tPHL is the same as tpd.
Figure 6-2 Voltage Waveforms Propagation Delays
SN74HCS240 Voltage Waveforms, Input and Output Transition Times
(1) The greater between tr and tf is the same as tt.
Figure 6-4 Voltage Waveforms, Input and Output Transition Times