SCHS167G November   1998  – October 2022 CD54HC240 , CD54HC244 , CD54HCT240 , CD54HCT241 , CD54HCT244 , CD74HC240 , CD74HC241 , CD74HC244 , CD74HCT240 , CD74HCT241 , CD74HCT244

PRODUCTION DATA  

  1. 1 Features
  2. 2 Description
  3. 3 Revision History
  4. 4 Pin Configuration and Functions
  5. 5 Specifications
    1. 5.1 Absolute Maximum Ratings (1)
    2. 5.2 Recommended Operating Conditions
    3. 5.3 Thermal Information
    4. 5.4 Electrical Characteristics '240
    5. 5.5 Electrical Characteristics '241
    6. 5.6 Electrical Characteristics '244
    7. 5.7 Switching Characteristics '240
    8. 5.8 Switching Characteristics '241
    9. 5.9 Switching Characteristics '244
  6. 6 Parameter Measurement Information
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
  8. 8 Power Supply Recommendations
  9. 9 Layout
    1. 9.1 Layout Guidelines
  10. 10Device and Documentation Support
    1. 10.1 Receiving Notification of Documentation Updates
    2. 10.2 Support Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 Glossary
  11. 11Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

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

2 Description

The ’HC240 and ’HCT240 are inverting three-state buffers having two active-low output enables. The CD74HC241, ’HCT241, ’HC244 and ’HCT244 are non-inverting three-state buffers that differ only in that the 241 has one active-high and one active-low output enable, and the 244 has two active-low output enables. All three types have identical pinouts.

Package Information
PART NUMBER PACKAGE(1) BODY SIZE (NOM)
CD74HC240 M (SOIC, 20) 12.80 mm × 7.50 mm
E (PDIP, 20) 25.40 mm × 6.35 mm
CD54HC240 F (CDIP, 20) 26.92 mm × 6.92 mm
CD74HCT240 M (SOIC, 20) 12.80 mm × 7.50 mm
E (PDIP, 20) 25.40 mm × 6.35 mm
PW (TSSOP, 20) 6.50 mm × 4.40 mm
CD54HCT240 F (CDIP, 20) 26.92 mm × 6.92 mm
CD74HC241 M (SOIC, 20) 12.80 mm × 7.50 mm
E (PDIP, 20) 25.40 mm × 6.35 mm
CD74HCT241 M (SOIC, 20) 12.80 mm × 7.50 mm
E (PDIP, 20) 25.40 mm × 6.35 mm
CD54HCT241 F (CDIP, 20) 26.92 mm × 6.92 mm
CD74HC244 M (SOIC, 20) 12.80 mm × 7.50 mm
E (PDIP, 20) 25.40 mm × 6.35 mm
CD54HC244 F (CDIP, 20) 26.92 mm × 6.92 mm
CD74HCT244 M (SOIC, 20) 12.80 mm × 7.50 mm
E (PDIP, 20) 25.40 mm × 6.35 mm
CD54HCT244 F (CDIP, 20) 26.92 mm × 6.92 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
GUID-D0FA178A-9DF3-4075-A4E6-41B3461CACE2-low.png Pinout Diagram