SCLS381M August   1997  – March 2015 SN74LV74A

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Electrical Characteristics
    5. 6.5  Switching Characteristics: VCC = 2.5 V ± 0.2 V
    6. 6.6  Switching Characteristics: VCC = 3.3 V ± 0.3 V
    7. 6.7  Switching Characteristics: VCC = 5 V ± 0.5 V
    8. 6.8  Timing Requirements: VCC = 2.5 V ± 0.2 V
    9. 6.9  Timing Requirements: VCC = 3.3 V ± 0.3 V
    10. 6.10 Timing Requirements: VCC = 5 V ± 0.5 V
    11. 6.11 Noise Characteristics
    12. 6.12 Operating Characteristics
    13. 6.13 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 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. 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 Curves
  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 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

封装选项

请参考 PDF 数据表获取器件具体的封装图。

机械数据 (封装 | 引脚)
  • D|14
  • RGY|14
  • DGV|14
  • PW|14
  • DB|14
  • NS|14
散热焊盘机械数据 (封装 | 引脚)
订购信息

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 SN74LV74A is a Low drive CMOS device that can be used for a multitude of bus interface type applications where output ringing is a concern. The low drive and slow edge rates will minimize overshoot and undershoot on the outputs. The inputs can accept voltages to 5.5 V at any valid VCC making it Ideal for down translation.

9.2 Typical Application

SN54LV74A SN74LV74A typapp1.pngFigure 5. Typical Application Schematic

9.2.1 Design Requirements

This device uses CMOS technology and has balanced output drive. Take care to avoid bus contention because it can drive currents that would exceed maximum limits. The high drive will also create fast edges into light loads so consider routing and load conditions to prevent ringing.

9.2.2 Detailed Design Procedure

  • Recommended input conditions:
    • Specified High and low levels. See (VIH and VIL) in Recommended Operating Conditions.
    • Inputs are overvoltage tolerant allowing them to go as high as 5.5 V at any valid VCC.
  • Recommended output conditions:
    • Load currents should not exceed 25 mA per output and 50 mA total for the part.
    • Outputs should not be pulled above VCC.

9.2.3 Application Curves

SN54LV74A SN74LV74A appcurve1.pngFigure 6. Switching Characteristics Comparison