SCLS128H December   1982  – August 2024 SN54HC240 , SN74HC240

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Description
  4. 3 Pin Configuration and Functions
  5. 4 Specifications
    1. 4.1 Absolute Maximum Ratings
    2. 4.2 Recommended Operating Conditions
    3. 4.3 Thermal Information
    4. 4.4 Electrical Characteristics
    5. 4.5 Switching Characteristics
    6. 4.6 Switching Characteristics
    7. 4.7 Operating Characteristics
  6. 5 Parameter Measurement Information
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Power Supply Recommendations
    2. 7.2 Layout
      1. 7.2.1 Layout Guidelines
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • W|20
  • J|20
  • FK|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) PACKAGE SIZE(2) BODY SIZE(3)
SN74HC240 DW (SOIC, 20) 12.80mm x 10.3mm 12.80mm x 7.50mm
DB (SSOP, 20) 7.2mm x 7.8mm 7.2mm x 5.30mm
DGS (VSSOP, 20) 5.1mm × 4.9mm 5.1mm × 3mm
PDIP (20) 24.33mm × 9.4mm 24.33mm × 6.35mm
NS (SOP, 20) 12.6mm x 7.8mm 12.6mm x 5.3mm
PW (TSSOP, 20) 6.50mm x 6.4mm 6.50mm x 4.40mm
SNx4HC240 J (CDIP, 20) 24.2mm x 7.62mm 24.2 mm x 6.92mm
FK (LCCC, 20) 8.9mm x 8.9mm 8.9mm x 8.9mm
W (CFP, 20) 13.09mm x 8.13mm 13.09mm x 6.92mm
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
(3) The body size (length × width) is a nominal value and does not include pins.
SN54HC240 SN74HC240 Functional Block Diagram Functional Block Diagram