ZHCSR91E September   2006  – December 2022 SN74LVC1T45-Q1

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  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  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 Typical Characteristics
      1.      Parameter Measurement Information
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
      1.      Application and Implementation
        1. 8.1 Application Information
          1. 8.1.1 Enable Times
        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 Curves
          2. 8.2.2 Bidirectional Logic Level-Shifting Application
            1. 8.2.2.1 Detailed Design Procedure
            2. 8.2.2.2 Application Curves
  8. 8 Power Supply Recommendations
  9. 9 Layout
    1. 9.1 Layout Guidelines
    2. 9.2 Layout Example
  10. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 接收文档更新通知
    3. 10.3 支持资源
    4. 10.4 Trademarks
    5. 10.5 静电放电警告
    6. 10.6 术语表
  11. 11Mechanical, 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)
  • DCK|6
散热焊盘机械数据 (封装 | 引脚)
订购信息

8 Power Supply Recommendations

The SN74LVC1T45-Q1 device uses two separate configurable power-supply rails, VCCA and VCCB. VCCA accepts any supply voltage from 1.65 V to 5.5 V, and VCCB accepts any supply voltage from 1.65 V to 5.5 V. The A port and B port are designed to track VCCA and VCCB, respectively allowing for low-voltage bidirectional translation between any of the 1.8-V, 2.5-V, 3.3-V, and 5-V voltage nodes.

Each VCC pin should have a good bypass capacitor to prevent power disturbance. For multiple VCC pins then 0.01-µF or 0.022-µF capacitor is recommended for each power pin. It is ok to parallel multiple bypass capacitors to reject different frequencies of noise. 0.1-µF and 1-µF capacitors are commonly used in parallel. The bypass capacitor should be installed as close to the power pin as possible for best results.

A proper power-up sequence is advisable as listed in the following:

  1. Connect ground before any supply voltage is applied.
  2. Power up VCCB.
  3. VCCA can be ramped up along with VCCB.

TI recommends that the inputs are grounded during power up. Take care to assure that any state changes do not affect system level operation.