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SN74LS294 可编程分频器/数字定时器

These programmable frequency dividers/digital timers contain 31 flip-flops plus 30 gates ('LS292) or 15 flip-flops plus 29 gates ('LS294) on a single chip. The count modulo is under digital control of the inputs provided.

Both types feature an active-low clear input to initialize the state of all flip-flops. To facilitate incoming inspection, test points are provided (TP1, TP2, and TP3 on the 'LS292 and TP on the 'LS294). These test points are not intended to drive system loads. Both types feature two clock inputs; either one may be used for clock gating. (See the function table below.)

A brief look at the digital timing capabilities of the 'LS292 will show that with a 1-MHz input frequency, programming for 210 will give a period of 1

SN74LS294
Voltage Nodes(V) 5
Vcc range(V) 4.75 to 5.25
Input Level TTL
Output Level TTL
Rating Catalog
Technology Family LS
SN74LS294 特性
SN74LS294 芯片订购指南
器件 状态 温度 价格(美元) 封装 | 引脚 封装数量 | 封装载体 丝印标记
SN74LS294N ACTIVE 0 to 70 5.55 | 1ku PDIP (N) | 16 25 | TUBE  
SN74LS294NE4 ACTIVE 0 to 70 5.55 | 1ku PDIP (N) | 16 25 | TUBE  
SN74LS294 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
SN74LS294N Pb-Free (RoHS) CU NIPDAU N/A for Pkg Type SN74LS294N SN74LS294N
SN74LS294NE4 Pb-Free (RoHS) CU NIPDAU N/A for Pkg Type SN74LS294NE4 SN74LS294NE4
SN74LS294 应用技术支持与电子电路设计开发资源下载
  1. SN74LS294 数据资料 dataSheet 下载.PDF
  2. TI 德州仪器特殊逻辑产品选型与价格 . xls
  3. Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
  4. Understanding and Interpreting Standard-Logic Data Sheets (PDF 857 KB)
  5. TI IBIS File Creation, Validation, and Distribution Processes (PDF 380 KB)
  6. Implications of Slow or Floating CMOS Inputs (PDF 101 KB)
  7. CMOS Power Consumption and CPD Calculation (PDF 89 KB)
  8. Designing With Logic (PDF 186 KB)
  9. Live Insertion (PDF 150 KB)
  10. Input and Output Characteristics of Digital Integrated Circuits (PDF 1708 KB)
  11. Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (PDF 43 KB)
  12. HiRel Unitrode Power Management Brochure (PDF 206 KB)
  13. LOGIC Pocket Data Book (PDF 6001 KB)
  14. HiRel Unitrode Power Management Brochure (PDF 206 KB)
  15. Logic Cross-Reference (PDF 2938 KB)