SN54LS669 同步 4 位加/减计数器

These synchronous presettable counters feature an internal carry look-ahead for cascading in high-speed counting applications. The 'LS668 are decade counters and the 'LS669 are 4-bit binary counters. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the count-enable inputs and internal gating. This mode of operation helps eliminate the output counting spikes that are normally associated with asynchronous (ripple-clock) counters. A buffered clock input triggers the four master-slave flip-flops on the rising (positive-going) edge of the clock waveform.

These counters are fully programmable; that is, the outputs may each be preset to either level

SN54LS669
Rating Military  
Technology Family LS  
SN54LS669 特性
SN54LS669 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
SN54LS669J ACTIVE -55 to 125 1.91 | 1ku CDIP (J) | 16 1 | TUBE  
SNJ54LS669FK ACTIVE -55 to 125 17.37 | 1ku LCCC (FK) | 20 1 | TUBE  
SNJ54LS669J ACTIVE -55 to 125 3.46 | 1ku CDIP (J) | 16 1 | TUBE  
SNJ54LS669W ACTIVE -55 to 125 15.12 | 1ku CFP (W) | 16 1 | TUBE  
SN54LS669 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
SN54LS669J TBD  A42   N/A for Pkg Type SN54LS669J SN54LS669J
SNJ54LS669FK TBD  POST-PLATE  N/A for Pkg Type SNJ54LS669FK SNJ54LS669FK
SNJ54LS669J TBD  A42   N/A for Pkg Type SNJ54LS669J SNJ54LS669J
SNJ54LS669W TBD  A42   N/A for Pkg Type SNJ54LS669W SNJ54LS669W
SN54LS669 应用技术支持与电子电路设计开发资源下载
  1. SN54LS669 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)