ZHCSXW4I July   2004  – February 2025 SN74AVCH2T45

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Pin Configurations 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
    6. 5.6  Switching Characteristics: VCCA = 1.2V
    7. 5.7  Switching Characteristics: VCCA = 1.5V
    8. 5.8  Switching Characteristics: VCCA = 1.8V
    9. 5.9  Switching Characteristics: VCCA = 2.5V
    10. 5.10 Switching Characteristics: VCCA = 3.3V
    11. 5.11 Operating Characteristics
    12. 5.12 Typical Characteristics
      1. 5.12.1 Typical Propagation Delay (A to B) vs Load Capacitance, TA = 25°C, VCCA = 1.8V
      2. 5.12.2 Typical Propagation Delay (A to B) vs Load Capacitance, TA = 25°C, VCCA = 2.5V
      3. 5.12.3 Typical Propagation Delay (A to B) vs Load Capacitance, TA = 25°C, VCCA = 3.3V
  7. 6 Parameter Measurement Information
    1. 6.1 23
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 VCC Isolation
      2. 7.3.2 2-Rail Design
      3. 7.3.3 IO Ports are 4.6 V Tolerant
      4. 7.3.4 Partial Power Down Mode
      5. 7.3.5 Bus Hold on Data Inputs
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Unidirectional Logic Level-Shifting Application
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curve
      2. 8.2.2 Bidirectional Logic Level-Shifting Application
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 Enable Times
        3. 8.2.2.3 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 接收文档更新通知
    3. 9.3 支持资源
    4. 9.4 Trademarks
    5. 9.5 静电放电警告
    6. 9.6 术语表
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

8.2.2 Bidirectional Logic Level-Shifting Application

Figure 8-3 shows the SN74AVCH2T45 used in a bidirectional logic level-shifting application. Because the SN74AVCH2T45 does not have an output-enable (OE) pin, system designers should take precautions to avoid bus contention between SYSTEM-1 and SYSTEM-2 when changing directions.

SN74AVCH2T45 Bidirectional Logic Level-Shifting ApplicationFigure 8-3 Bidirectional Logic Level-Shifting Application