SCAS293M January   1993  – June 2026 SN74LVC240A

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5.   5
  6.   6
  7. 4 Pin Configuration and Functions
  8. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Switching Characteristics, –40°C to 85°C
    7. 5.7 Switching Characteristics, –40°C to 125°C
    8. 5.8 Operating Characteristics
    9. 5.9 Typical Characteristics
  9. 6 Parameter Measurement Information
  10. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Balanced CMOS 3-State Outputs
      2. 7.3.2 Partial Power Down (Ioff)
      3. 7.3.3 Standard CMOS Inputs
      4. 7.3.4 Clamp Diode Structure
    4. 7.4 Device Functional Modes
  11. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
        1. 8.2.1.1 Power Considerations
        2. 8.2.1.2 Input Considerations
        3. 8.2.1.3 Output Considerations
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  12. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  13.   49
  14. 10Revision History
  15. 11Mechanical, Packaging, and Orderable Information

3 Description

The SN74LVC240A is an octal buffer with 3-state outputs. The device is configured into two banks of four drivers, each controlled by an output enable pin.

Package Information
PART NUMBER PACKAGE(1) PACKAGE SIZE(2) BODY SIZE(3)
SN74LVC240A PW (TSSOP, 20) 6.5mm × 6.4mm 6.5mm × 4.4mm
DW (SOIC, 20) 12.80mm × 10.3mm 12.8mm × 7.5mm
DB (SSOP, 20) 7.2mm × 7.8mm 7.50mm × 5.3mm
NS (SOP, 20) 12.6mm × 7.8mm 12.6mm × 5.3mm
DGS (VSSOP, 20) 5.1mm × 4.9mm 5.1mm × 3.0mm
RKS (VQFN, 20) 4.5mm × 2.5mm 4.5mm × 2.5mm
DGV (TVSOP, 20) 5.0mm × 6.4mm 5.0mm × 4.4mm
(1) For more information, see Mechanical, Packaging, and Orderable Information.
(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.
SN74LVC240A Functional Block Diagram Functional Block Diagram