SN74LS257B 具有三态输出的四路 2 线路至 1 线路数据选择器/多路复用器

These devices are designed to multiplex signals from four-bit data sources to four-output data lines in bus-organized systems. The 3-state outputs will not load the data lines when the output control pin (G\) is at a high-logic level.

Series 54LS and 54S are characterized for operation over the full military temperature range of -55°C to 125°C; Series 74LS and 74S are characterized for operation from 0°C to 70°C

SN74LS257B
Rating Catalog  
Technology Family LS
SN74LS257B 特性
SN74LS257B 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
SN74LS257BD ACTIVE 0 to 70 0.95 | 1ku SOIC (D) | 16 40 | TUBE  
SN74LS257BDE4 ACTIVE 0 to 70 0.95 | 1ku SOIC (D) | 16 40 | TUBE  
SN74LS257BDG4 ACTIVE 0 to 70 0.95 | 1ku SOIC (D) | 16 40 | TUBE  
SN74LS257BDR ACTIVE 0 to 70 0.80 | 1ku SOIC (D) | 16 2500 | LARGE T&R  
SN74LS257BDRE4 ACTIVE 0 to 70 0.80 | 1ku SOIC (D) | 16 2500 | LARGE T&R  
SN74LS257BDRG4 ACTIVE 0 to 70 0.80 | 1ku SOIC (D) | 16 2500 | LARGE T&R  
SN74LS257BN ACTIVE 0 to 70 0.90 | 1ku PDIP (N) | 16 25 | TUBE  
SN74LS257BNE4 ACTIVE 0 to 70 0.90 | 1ku PDIP (N) | 16 25 | TUBE  
SN74LS257B 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
SN74LS257BD Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS257BD SN74LS257BD
SN74LS257BDE4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS257BDE4 SN74LS257BDE4
SN74LS257BDG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS257BDG4 SN74LS257BDG4
SN74LS257BDR Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS257BDR SN74LS257BDR
SN74LS257BDRE4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS257BDRE4 SN74LS257BDRE4
SN74LS257BDRG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS257BDRG4 SN74LS257BDRG4
SN74LS257BN Pb-Free (RoHS)  CU NIPDAU  N/A for Pkg Type SN74LS257BN SN74LS257BN
SN74LS257BNE4 Pb-Free (RoHS)  CU NIPDAU  N/A for Pkg Type SN74LS257BNE4 SN74LS257BNE4
SN74LS257B 应用技术支持与电子电路设计开发资源下载
  1. SN74LS257B 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)