ZHCSP97E September   1997  – April 2022 CD54HCT390 , CD74HC390 , CD74HCT390

PRODUCTION DATA  

  1. 1 特性
  2. 2 说明
  3. 3 Revision History
  4. 4 Pin Configuration and Functions
  5. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 Recommended Operating Conditions (1)
    3. 5.3 Thermal Information
    4. 5.4 Electrical Characteristics
    5. 5.5 Prerequisite for Switching Characteristics
    6. 5.6 Switching Characteristics
  6. 6 Parameter Measurement Information
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Device Functional Modes
  8. 8 Power Supply Recommendations
  9. 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)
  • N|16
  • D|16
散热焊盘机械数据 (封装 | 引脚)
订购信息

7.3 Device Functional Modes

Table 7-1 Truth Table(1)
INPUTS ACTION
CLK CLR
↑ L No Change
↓ L Count
X H All Qs Low
(1) H = High voltage level.
L = Low voltage level.
X = Dont care.
↑ = Transition from low to high level.
↓ = Transition from high to low.
Table 7-2 BCD Count Sequence For ½ the 390(1)
COUNT OUTPUTS
QD QC QB QA
0 L L L L
1 L L L H
2 L L H L
3 L L H H
4 L H L L
5 L H L H
6 L H H L
7 L H H H
8 H L L L
9 H L L H
(1) Ouput nQA connected to nCLKB with counter input on nCLKA.
Table 7-3 B-Quinary Count Sequence For ½ the 390(1)
COUNT OUTPUTS
QD QC QB QA
0 L L L L
1 L L H L
2 L H L L
3 L H H L
4 H L L L
5 L L L H
6 L L H H
7 L H L H
8 L H H H
9 H L L H
(1) Output nQD connected to nCLKA with counter input on nCLKB.
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