SCLS252N October   1995  – February 2018 SN54AHCT240 , SN74AHCT240

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Noise Characteristics
    8. 6.8 Operating Characteristics
  7. 7 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
    4. 9.4 Device Functional Modes
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Community Resources
    2. 13.2 Related Links
    3. 13.3 Trademarks
    4. 13.4 Electrostatic Discharge Caution
    5. 13.5 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DB|20
  • NS|20
  • N|20
  • DW|20
  • PW|20
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.6 Switching Characteristics

over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) (see Parameter Measurement Information section)
PARAMETERTEST CONDITIONSTA = 25°C SN54AHCT240–40°C to 85°C
SN74AHCT240		–40°C to 125°C
SN74AHCT240		UNIT
TYPMAXMINMAXMINMAXMINMAX
tPLH Propagation delay time
(low-to-high output)		 A-to-Y CL = 15 pF 5.4(1) 7.4(1) 1(1) 8.5(1) 1 8.5 1 9.5 ns
tPHL Propagation delay time
(high-to-low output)		 5.4(1) 7.4(1) 1(1) 8.5(1) 1 8.5 1 9.5
tPZH Enable time
(to the high level)		 OE-to-Y CL = 15 pF 7.7(1) 10.4(1) 1(1) 12(1) 1 12 1 13 ns
tPZL Enable time
(to the low level)		 7.7(1) 10.4(1) 1(1) 12(1) 1 12 1 13
tPHZ Disable time
(from high level)		 OE-to-Y CL = 15 pF 8.3(1) 10.4(1) 1(1) 12(1) 1 12 1 13 ns
tPLZ Disable time
(from low level)		 8.3(1) 10.4(1) 1(1) 12(1) 1 12 1 13
tPLH Propagation delay time
(low-to-high output)		 A-to-Y CL = 50 pF 5.9 8.4 1 9.5 1 9.5 1 10.5 ns
tPHL Propagation delay time
(high-to-low output)		 5.9 8.4 1 9.5 1 9.5 1 10.5
tPZH Enable time
(to the high level)		 OE-to-Y CL = 50 pF 8.2 11.4 1 13 1 13 1 14 ns
tPZL Enable time
(to the low level)		 8.2 11.4 1 13 1 13 1 14
tPHZ Disable time
(from high level)		 OE-to-Y CL = 50 pF 8.8 11.4 1 13 1 13 1 14 ns
tPLZ Disable time
(from low level)		 8.8 11.4 1 13 1 13 1 14
tsk(o) Skew (time), output CL = 50 pF 1(2) 1 1 1 ns
(1) On products compliant to MIL-PRF-38535, this parameter is not production tested.
(2) On products compliant to MIL-PRF-38535, this parameter does not apply.