SCES469F August   2003  – March 2020 SN74LVC1404

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Simplified Schematic
  5. 5 Revision History
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Switching Characteristics, CL = 15 pF
    7. 7.7 Switching Characteristics, CL = 30 pF or 50 pF
    8. 7.8 Operating Characteristics
    9. 7.9 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
    4. 9.4 Device Functional Modes
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Testing
      3. 10.2.3 Application Curves
        1. 10.2.3.1 LVC1404 in 25-MHz Crystal-Oscillator Circuit
        2. 10.2.3.2 LVC1404 in 10-MHz Crystal-Oscillator Circuit
        3. 10.2.3.3 LVC1404 in 2-MHz Crystal-Oscillator Circuit
        4. 10.2.3.4 LVC1404 in 100-kHz Crystal-Oscillator Circuit
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Trademarks
    2. 13.2 Electrostatic Discharge Caution
    3. 13.3 Glossary
  14. 14Mechanical, 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)
  • DCU|8
  • YZP|8
  • DCT|8
散热焊盘机械数据 (封装 | 引脚)
订购信息

10.1 Application Information

Figure 4 shows a typical application of the SN74LVC1404 device in a Pierce oscillator circuit. The output voltage can be conditioned further by connecting OSCOUT to the Schmitt-trigger input inverter. The Schmitt-trigger input inverter produces a rail-to-rail voltage waveform. The recommended load for the crystal, shown in this example, is 16 pF. The value of the recommended load (CL) can be found in the crystal manufacturer's data sheet. Values of C1 and C2 are chosen so that SN74LVC1404 ineq1_ces469.gif and C1 ≉ C2. Rs is the current-limiting resistor, and the value depends on the maximum power dissipation of the crystal. Generally, the recommended value of Rs is specified in the crystal manufacturer's data sheet and, usually, this value is approximately equal to the reactance of C2 at resonance frequency, that is, RS = XC2. RF is the feedback resistor that is used to bias the inverter in the linear region of operation. Usually, the value is chosen to be within 1 MΩ to 10 MΩ.