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SN74LS251 具有三态输出的 8 线路到 1 线路数据选择器/多路复用器

These monolithic data selectors/multiplexers contain full on-chip binary decoding to select one-of-eight data sources and feature a strobe-controlled three-state output. The strobe must be at a low logic level to enable these devices. The three-state outputs permit a number of outputs to be connected to a common bus. When the strobe input is high, both outputs are in a high-impedance state in which both the upper and lower transistors of each totem-pole output are off, and the output neither drives nor loads the bus significantly. When the strobe is low, the outputs are activated and operate as standard TTL totem-pole outputs.

To minimize the possibility that two outputs will attempt to take a common bus to opposite logic levels, the output control circuitry is designed so that the average output disable time is shorter than the average output enable time

SN74LS251
Rating Catalog
Technology Family LS
SN74LS251 特性
SN74LS251 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
SN74LS251D ACTIVE 0 to 70 0.95 | 1ku SOIC (D) | 16 40 | TUBE  
SN74LS251DE4 ACTIVE 0 to 70 0.95 | 1ku SOIC (D) | 16 40 | TUBE  
SN74LS251DG4 ACTIVE 0 to 70 0.95 | 1ku SOIC (D) | 16 40 | TUBE  
SN74LS251DR ACTIVE 0 to 70 0.80 | 1ku SOIC (D) | 16 2500 | LARGE T&R  
SN74LS251DRE4 ACTIVE 0 to 70 0.80 | 1ku SOIC (D) | 16 2500 | LARGE T&R  
SN74LS251DRG4 ACTIVE 0 to 70 0.80 | 1ku SOIC (D) | 16 2500 | LARGE T&R  
SN74LS251N ACTIVE 0 to 70 0.90 | 1ku PDIP (N) | 16 25 | TUBE  
SN74LS251NE4 ACTIVE 0 to 70 0.90 | 1ku PDIP (N) | 16 25 | TUBE  
SN74LS251 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
SN74LS251D Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74LS251D SN74LS251D
SN74LS251DE4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74LS251DE4 SN74LS251DE4
SN74LS251DG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74LS251DG4 SN74LS251DG4
SN74LS251DR Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74LS251DR SN74LS251DR
SN74LS251DRE4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74LS251DRE4 SN74LS251DRE4
SN74LS251DRG4 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74LS251DRG4 SN74LS251DRG4
SN74LS251N Pb-Free (RoHS) CU NIPDAU N/A for Pkg Type SN74LS251N SN74LS251N
SN74LS251NE4 Pb-Free (RoHS) CU NIPDAU N/A for Pkg Type SN74LS251NE4 SN74LS251NE4
SN74LS251 应用技术支持与电子电路设计开发资源下载
  1. SN74LS251 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)