ZHCSQU0C November   1998  – July 2022 CD54HC640 , CD54HCT640 , CD74HC640 , CD74HCT640

PRODUCTION DATA  

  1. 特性
  2. 说明
  3. Revision History
  4. Pin Configuration and Functions
  5. Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 Recommended Operating Conditions
    3. 5.3 Thermal Information
    4. 5.4 Electrical Characteristics
    5. 5.5 Switching Characteristics (2)
  6. Parameter Measurement Information
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Device Functional Modes
  8. Power Supply Recommendations
  9. Layout
    1. 9.1 Layout Guidelines
  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 Electrostatic Discharge Caution
    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)
  • J|20
散热焊盘机械数据 (封装 | 引脚)
订购信息

Device Functional Modes

Table 7-1 Function Table(2)
Control Inputs(1) Data Port Status
OE DIR An Bn
L L O I
H H Z Z
H L Z Z
L H I O
H = High level. L = Low level. I = Input. O = Output (inversion of input level). Z = High impedance.
To prevent excess currents in the High-Z modes all I/O terminals should be terminated with 1kΩ to 1MΩ resistors.