SCAS982 March   2024 SN74AHCT257

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6.   6
  7.   7
  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 Noise 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 Balanced CMOS 3-State Outputs
      2. 7.3.2 TTL-Compatible CMOS Inputs
      3. 7.3.3 Clamp Diode Structure
    4. 7.4 Device Functional Modes
  11. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
    3. 8.3 Design Requirements
      1. 8.3.1 Power Considerations
      2. 8.3.2 Input Considerations
      3. 8.3.3 Output Considerations
    4. 8.4 Detailed Design Procedure
    5. 8.5 Application Curve
    6. 8.6 Power Supply Recommendations
    7. 8.7 Layout
      1. 8.7.1 Layout Guidelines
      2. 8.7.2 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

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • BQB|16
  • PW|16
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5.6 Switching Characteristics

over operating free-air temperature range(unless otherwise noted). See Parameter Measurement Information
PARAMETER FROM (INPUT) TO (OUTPUT) LOAD CAPACITANCE VCC TA = 25°C -40°C to 125°C UNIT
MIN TYP MAX MIN TYP MAX
tPHL A or B Any Y CL = 15pF 5V ± 0.5V 3.7 6.4 1 9 ns
tPLH
A or B

 Any Y CL = 15pF 5V ± 0.5V 3.7 6.4 1 9 ns
tPHL A/B Any Y CL = 15pF 5V ± 0.5V 5.1 8.1 1 11.5 ns
tPLH A/B Any Y CL = 15pF 5V ± 0.5V 5.1 8.1 1 11.5 ns
tPHZ OE Any Y CL = 15pF 5V ± 0.5V 4.5 7.5 1 8.5 ns
tPLZ OE Any Y CL = 15pF 5V ± 0.5V 4.5 7.5 1 8.5 ns
tPZH OE Any Y CL = 15pF 5V ± 0.5V 3.9 8 1 10 ns
tPZL OE Any Y CL = 15pF 5V ± 0.5V 3.9 8 1 10 ns
tPHL
A or B

 Any Y CL = 50pF 5V ± 0.5V 4.9 8.5 1 11 ns
tPLH
A or B

 Any Y CL = 50pF 5V ± 0.5V 4.9 8.5 1 11 ns
tPHL A/B Any Y CL = 50pF 5V ± 0.5V 6.4 10.4 1 13.5 ns
tPLH A/B Any Y CL = 50pF 5V ± 0.5V 6.4 10.4 1 13.5 ns
tPHZ OE Any Y CL = 50pF 5V ± 0.5V 6.5 9.5 1 11.5 ns
tPLZ OE Any Y CL = 50pF 5V ± 0.5V 6.5 9.5 1 11.5 ns
tPZH OE Any Y CL = 50pF 5V ± 0.5V 5.1 10 1 12 ns
tPZL OE Any Y CL = 50pF 5V ± 0.5V 5.1 10 1 12 ns