SN74LS148 8 线路到 3 线路优先编码器

These TTL encoders feature priority decoding of the inputs to ensure that only the highest-order data line is encoded. The '147 and 'LS147 encode nine data lines to four-line (8-4-2-1) BCD. The implied decimal zero condition requires no input condition as zero is encoded when all nine data lines are at a high logic level. The '148 and 'LS148 encode eight data lines to three-line (4-2-1) binary (octal). Cascading circuitry (enable input E1 and enable output E0) has been provided to allow octal expansion without the need for external circuitry. For all types, data inputs and outputs are active at the low logic level. All inputs are buffered to represent one normalized Series 54/74 or 54LS/74LS load, respectively.

SN74LS148
Rating Catalog  
Technology Family LS
SN74LS148 特性
SN74LS148 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
SN74LS148D ACTIVE 0 to 70 1.10 | 1ku SOIC (D) | 16 40 | TUBE  
SN74LS148DE4 ACTIVE 0 to 70 1.10 | 1ku SOIC (D) | 16 40 | TUBE  
SN74LS148DG4 ACTIVE 0 to 70 1.10 | 1ku SOIC (D) | 16 40 | TUBE  
SN74LS148DR ACTIVE 0 to 70 0.90 | 1ku SOIC (D) | 16 2500 | LARGE T&R  
SN74LS148DRE4 ACTIVE 0 to 70 0.90 | 1ku SOIC (D) | 16 2500 | LARGE T&R  
SN74LS148DRG4 ACTIVE 0 to 70 0.90 | 1ku SOIC (D) | 16 2500 | LARGE T&R  
SN74LS148N ACTIVE 0 to 70 1.00 | 1ku PDIP (N) | 16 25 | TUBE  
SN74LS148NE4 ACTIVE 0 to 70 1.00 | 1ku PDIP (N) | 16 25 | TUBE  
SN74LS148 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
SN74LS148D Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS148D SN74LS148D
SN74LS148DE4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS148DE4 SN74LS148DE4
SN74LS148DG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS148DG4 SN74LS148DG4
SN74LS148DR Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS148DR SN74LS148DR
SN74LS148DRE4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS148DRE4 SN74LS148DRE4
SN74LS148DRG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS148DRG4 SN74LS148DRG4
SN74LS148N Pb-Free (RoHS)  CU NIPDAU  N/A for Pkg Type SN74LS148N SN74LS148N
SN74LS148NE4 Pb-Free (RoHS)  CU NIPDAU  N/A for Pkg Type SN74LS148NE4 SN74LS148NE4
SN74LS148 应用技术支持与电子电路设计开发资源下载
  1. SN74LS148 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)