SCLS128G December   1982  – April 2022 SN54HC240 , SN74HC240

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
    2. 5.2 Recommended Operating Conditions (1)
    3. 5.3 Thermal Information
    4. 5.4 Electrical Characteristics
    5. 5.5 Switching Characteristics
    6. 5.6 Switching Characteristics
    7. 5.7 Operating Characteristics
  6. 6 Parameter Measurement Information
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Device Functional Modes
  8. 8 Power Supply Recommendations
  9. 9 Layout
    1. 9.1 Layout Guidelines
  10. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  11. 11Introduction to Mechanical, 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

2 Description

These octal buffers and line drivers are designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. The ’HC240 devices are organized as two 4-bit buffers/drivers with separate output-enable (OE) inputs. When OE is low, the device passes inverted data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state.

Device Information
PART NUMBER PACKAGE(1) BODY SIZE (NOM)
SN74HC240DW SOIC (20) 12.8 mm × 7.50 mm
SN74HC240DBR SSOP (20) 7.2 mm × 5.30 mm
SN74HC240N PDIP (20) 25.40 mm × 6.35 mm
SN74HC240NSR SO (20) 15.00 mm × 5.30 mm
SN74HC240PW TSSOP (20) 6.50 mm × 4.40 mm
SN74HC240J CDIP (20) 26.92 mm × 6.92 mm
SNJ54HC240FK LCCC (20) 8.89 mm × 8.45 mm
SNJ54HC240W CFP (20) 13.72 mm × 6.92 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
GUID-1DE4AAA4-AD85-4E45-BC95-3EB06FCB412A-low.png Functional Block Diagram