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

6.5 Electrical Characteristics

over recommended operating free-air temperature range (unless otherwise noted)
PARAMETERTEST CONDITIONSTA = 25°CSN54AHCT240–40°C to 85°C
SN74AHCT240		–40°C to 125°C
SN74AHCT240		UNIT
MINTYPMAXMINMAXMINMAXMINMAX
VOH High-level output voltage IOH = –50 µA, VCC = 4.5 V 4.4 4.5 4.4 4.4 4.4 V
IOH = –8 mA, VCC = 4.5 V 3.94 3.8 3.8 3.8
VOL Low-level output voltage IOL = 50 µA, VCC = 4.5 V 0.1 0.1 0.1 0.1 V
IOL = 8 mA, VCC = 4.5 V 0.36 0.44 0.44 0.44
IOZ High-impedance-state output current VO = VCC or GND
VCC = 5.5 V 		±0.25 ±2.5 ±2.5 ±2.5 µA
II Inflection-point current VI = 5.5 V or GND
VCC = 0 V to 5.5 V 		±0.1 ±1(1) ±1 ±1 µA
ICC Supply current VI = VCC or GND
IO = 0,VCC = 5.5 V 		4 40 40 40 µA
ΔICC(2) Supply current change One input at 3.4 V
other inputs at VCC or GND
VCC = 5.5 V 		1.35 1.5 1.5 1.5 mA
Ci Input capacitance VI = VCC or GND
VCC = 5.5 V 		2.5 10 10 10 pF
Co Output capacitance VO = VCC or GND
VCC = 5.5 V 		3 pF
(1) On products compliant to MIL-PRF-38535, this parameter is not production tested at VCC = 0 V.
(2) This is the increase in supply current for each input at one of the specified TTL voltage levels, rather than 0 V or VCC.