SCLS175I March   2003  – February 2025 SN54HCT244 , SN54HCT244-SP , SN74HCT244

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 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 - SN54HCT244
    6. 5.6  Electrical Characteristics - SN74HCT244
    7. 5.7  Switching Characteristics: SN54HCT244
    8. 5.8  Switching Characteristics: SN74HCT244
    9. 5.9  Operating Characteristics
    10. 5.10 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 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
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

3 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 SNx4HCT244 devices are organized as two 4-bit buffers or drivers with separate output-enable (OE) inputs. When OE is low, the device passes non 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)
SN74HCT244 DB (SSOP, 20) 7.2mm × 7.8mm 7.2mm × 5.3mm
DW (SOIC, 20) 12.80mm × 10.3mm 12.8mm × 7.5mm
N (PDIP, 20) 24.33mm x 9.4mm 24.33mm × 6.35mm
NS (SOP, 20) 12.6mm × 7.8mm 12.6mm × 5.3mm
PW (TSSOP, 20) 6.5mm × 6.4mm 6.5mm × 4.4mm
DGS (VSSOP, 20) 5.1mm × 3mm 5.1mm × 4.9mm
SN54HCT244 J (CDIP, 20) 24.2mm x 7.62mm 24.2mm x 7.62mm
FK (LCCC, 20) 8.89mm × 8.89mm 8.89mm × 8.89mm
(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.
SN54HCT244 SN74HCT244 Logic Diagram (Positive Logic)Logic Diagram (Positive Logic)