SCLS383N September   1997  – October 2015 SN74LV244A

PRODUCTION DATA.  

  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  Noise Characteristics
    7. 6.7  Operating Characteristics
    8. 6.8  Switching Characteristics: VCC = 2.5 V ± 0.2 V
    9. 6.9  Switching Characteristics: VCC = 3.3 V ± 0.3 V
    10. 6.10 Switching Characteristics: VCC = 5 V ± 0.5 V
    11. 6.11 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 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

パッケージ・オプション

デバイスごとのパッケージ図は、PDF版データシートをご参照ください。

メカニカル・データ(パッケージ|ピン)
  • DGV|20
  • DB|20
  • NS|20
  • DW|20
  • PW|20
  • RGY|20
サーマルパッド・メカニカル・データ
発注情報

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

9.1 Application Information

The SN74LV244A device can be used as an 8-channel buffer to drive signals from one controller to another device. Buffers are typically used for signals running on long traces on printed circuit boards or going through connectors linking two printed circuit boards together. Buffers are also used to create delay between the lines to match the edges of two clock or data signals. The high-current capability of the SN74LV244A device also allows a controller to drive LEDs up to 16 mA.

9.2 Typical Application

SN74LV244A appsinfo.gif Figure 4. Typical Application Diagram

9.2.1 Design Requirements

A 0.1-µF bypass capacitor must be placed between each VCC pin and GND. For best results, each capacitor must be placed as close as possible to the SN74LV244A device.

9.2.2 Detailed Design Procedure

  1. Recommended input conditions:
    • For specified high and low levels, see VIH and VIL in Recommended Operating Conditions
    • Inputs and outputs are overvoltage tolerant, which allows them to go as high as 5.5 V at any valid VCC
  2. Recommended output conditions:
  3. Frequency selection criterion:
    • Added trace resistance or capacitance can reduce maximum frequency capability; use layout practices as directed in Layout Guidelines

9.2.3 Application Curve

SN74LV244A Transient.gif Figure 5. SN74LV244A Transient response