ZHCSR29M December   2003  – October 2022 SN74LVC2T45

PRODUCTION DATA  

  1. 特性
  2. 应用
  3. 说明
  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: VCCA = 1.8 V ± 0.15 V
    7. 6.7  Switching Characteristics: VCCA = 2.5 V ± 0.2 V
    8. 6.8  Switching Characteristics: VCCA = 3.3 V ± 0.3 V
    9. 6.9  Switching Characteristics: VCCA = 5 V ± 0.5 V
    10. 6.10 Operating Characteristics
    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
      1. 8.3.1 Fully Configurable Dual-Rail Design Allows Each Port to Operate Over the Full 1.65-V to 5.5-V Power-Supply Range
      2. 8.3.2 Support High-Speed Translation
      3. 8.3.3 Ioff Supports Partial-Power-Down Mode Operation
      4. 8.3.4 Balanced High-Drive CMOS Push-Pull Outputs
      5. 8.3.5 Vcc Isolation
    4. 8.4 Device Functional Modes
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Unidirectional Logic Level-Shifting Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curve
      2. 9.2.2 Bidirectional Logic Level-Shifting Application
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
          1. 9.2.2.2.1 Enable Times
        3. 9.2.2.3 Application Curve
  10. 10Power Supply Recommendations
    1. 10.1 Power-Up Considerations
  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 接收文档更新通知
    3. 12.3 支持资源
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 术语表
  13. 13Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

说明

这款 2 位同相总线收发器使用两个独立的可配置电源轨。A 端口旨在跟踪 VCCA。VCCA可接受从 1.65V 到 5.5V 范围内的任意电源电压。B 端口旨在跟踪 VCCB。VCCB可接受从 1.65 至 5.5V 间的任一电源电压值。这可实现 1.8V,2.5V,3.3V和 5V 电压节点间的通用低压双向转换。

SN74LVC2T45 旨在实现两条数据总线间的异步通信。方向控制 (DIR) 输入的逻辑电平将会激活 B 端口或 A 端口输出。当 B 端口输出被激活时,此器件将数据从 A 总线发送到 B 总线,而当 A 端口输出被激活时,此器件将数据从 B 总线发送到 A 总线。A 端口和 B 端口上的输入电路一直处于激活状态,并且必须施加一个逻辑高或低电平,从而防止过大的 ICC 和 ICCZ

SN74LVC2T45 设计为由 VCCA 为 DIR 输入电路供电。该器件完全符合使用 Ioff 的部分断电应用的规范要求。Ioff 电路禁用输出,从而可防止其断电时破坏性电流从该器件回流。

VCC 隔离特性可确保只要有任何一个 VCC 输入接地 (GND),则两个端口均处于高阻抗状态。

封装信息(1)
器件型号 封装 封装尺寸(标称值)
SN74LVC2T45 DCT(SM8,8) 2.95mm × 2.80mm
DCU(VSSOP,8) 2.30mm × 2.00mm
YZP(DSBGA,8) 1.89 mm × 0.89 mm
如需了解所有可用封装,请参阅数据表末尾的可订购产品附录。