SN74LS390 双路 4 位十进制和二进制计数器

Each of these monolithic circuits contains eight master-slave flip-flops and additional gating to implement two individual four-bit counters in a single package. The '390 and 'LS390 incorporate dual divide-by-two and divide-by-five counters, which can be used to implement cycle lengths equal to any whole and/or cumulative multiples of 2 and/or 5 up to divide-by-100. When connected as a bi-quinary counter, the separate divide-by-two circuit can be used to provide symmetry (a square wave) at the final output stage. The '393 and 'LS393 each comprise two independent four-bit binary counters each having a clear and a clock input. N-bit binary counters can be implemented with each package providing the capability of divide-by-256.

SN74LS390
Rating Catalog    
Technology Family LS
SN74LS390 特性
SN74LS390 芯片订购指南
器件 状态 温度 价格 封装 | 引脚 封装数量 | 封装载体 丝印标记
SN74LS390D ACTIVE 0 to 70 1.15 | 1ku SOIC (D) | 16 40 | TUBE  
SN74LS390DE4 ACTIVE 0 to 70 1.15 | 1ku SOIC (D) | 16 40 | TUBE  
SN74LS390DG4 ACTIVE 0 to 70 1.15 | 1ku SOIC (D) | 16 40 | TUBE  
SN74LS390DR ACTIVE 0 to 70 0.95 | 1ku SOIC (D) | 16 2500 | LARGE T&R  
SN74LS390DRE4 ACTIVE 0 to 70 0.95 | 1ku SOIC (D) | 16 2500 | LARGE T&R  
SN74LS390DRG4 ACTIVE 0 to 70 0.95 | 1ku SOIC (D) | 16 2500 | LARGE T&R  
SN74LS390N ACTIVE 0 to 70 1.05 | 1ku PDIP (N) | 16 25 | TUBE  
SN74LS390NE4 ACTIVE 0 to 70 1.05 | 1ku PDIP (N) | 16 25 | TUBE  
SN74LS390 质量与无铅数据
器件 环保计划* 铅/焊球涂层 MSL 等级/回流焊峰 环保信息与无铅 (Pb-free) DPPM / MTBF / FIT 率
SN74LS390D Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS390D SN74LS390D
SN74LS390DE4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS390DE4 SN74LS390DE4
SN74LS390DG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS390DG4 SN74LS390DG4
SN74LS390DR Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS390DR SN74LS390DR
SN74LS390DRE4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS390DRE4 SN74LS390DRE4
SN74LS390DRG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS390DRG4 SN74LS390DRG4
SN74LS390N Pb-Free (RoHS)  CU NIPDAU  N/A for Pkg Type SN74LS390N SN74LS390N
SN74LS390NE4 Pb-Free (RoHS)  CU NIPDAU  N/A for Pkg Type SN74LS390NE4 SN74LS390NE4
SN74LS390 应用技术支持与电子电路设计开发资源下载
  1. SN74LS390 数据资料 dataSheet 下载.PDF
  2. TI 德州仪器MSI 功能产品选型与价格 . xls
  3. Logic Guide 2009 (PDF 4263 KB)
  4. Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
  5. Understanding and Interpreting Standard-Logic Data Sheets (PDF 857 KB)
  6. TI IBIS File Creation, Validation, and Distribution Processes (PDF 380 KB)
  7. Implications of Slow or Floating CMOS Inputs (PDF 101 KB)
  8. CMOS Power Consumption and CPD Calculation (PDF 89 KB)
  9. Designing With Logic (PDF 186 KB)
  10. Live Insertion (PDF 150 KB)
  11. Input and Output Characteristics of Digital Integrated Circuits (PDF 1708 KB)
  12. Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (PDF 43 KB)
  13. HiRel Unitrode Power Management Brochure (PDF 206 KB)
  14. LOGIC Pocket Data Book (PDF 6001 KB)
  15. HiRel Unitrode Power Management Brochure (PDF 206 KB)
  16. Logic Cross-Reference (PDF 2938 KB)