SCLS175E Month   2003  – August 2016 SN54HCT244 , SN74HCT244

 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics: CL = 50 pF
    7. 6.7 Switching Characteristics: CL = 150 pF
    8. 6.8 Operating Characteristics
    9. 6.9 Typical Characteristics
  7. Parameter Measurement Information
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
    4. 8.4 Device Functional Modes
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Related Links
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Community Resource
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, 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

1 Features

  • Operating Voltage Range of 4.5 V to 5.5 V
  • High-Current Outputs Drive up to 15 LSTTL Loads
  • Low Power Consumption: 80-µA Maximum ICC
  • Typical tpd = 13 ns
  • ±6-mA Output Drive at 5 V
  • Low Input Current of 1 µA Maximum
  • Inputs Are TTL-Voltage Compatible
  • 3-State Outputs Drive Bus Lines and Buffer Memory Address Registers

2 Applications

  • Servers
  • LED Displays
  • Network Switches
  • Telecom Infrastructure
  • Motor Drivers
  • I/O Expanders

3 Description

These octal buffers and line drivers are designed specifically to improve both the performance and density of 3-state memory address drivers, clockdrivers, 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 noninverted data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
SN74HCT244DB SSOP (20) 7.20 mm × 5.30 mm
SN74HCT244DW SOIC (20) 12.80 mm × 7.50 mm
SN74HCT244N PDIP (20) 24.33 mm × 6.35 mm
SN74HCT244NS SO (20) 12.60 mm × 5.30 mm
SN74HCT244PW TSSOP (20) 6.50 mm × 4.40 mm
SN54HCT244 CDIP (20) 24.20 mm × 6.92 mm
LCCC (20) 8.89 mm × 8.89 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Logic Diagram (Positive Logic)

SN54HCT244 SN74HCT244 logic_cls175.gif