SN74LS221 具有施密特触发输入的双路单稳多频振荡器

The '221 and 'LS221 devices are monolithic dual multivibrators with performance characteristics virtually identical to those of the '121 devices. Each multivibrator features a negative-transition- triggered input and a positive-transition-triggered input, either of which can be used as an inhibit input.

Pulse triggering occurs at a particular voltage level and is not directly related to the transition time of the input pulse. Schmitt-trigger input circuitry (TTL hysteresis) for B input allows jitter-free triggering from inputs with transition rates as slow as 1 V/s, providing the circuit with excellent noise immunity, typically of 1.2 V. A high immunity to VCC noise, typically of 1.5 V, is also provided by internal latching circuitry

SN74LS221
Voltage Nodes(V) 5  
Vcc range(V) 4.75 to 5.25  
Input Level TTL  
Output Level TTL  
Rating Catalog  
Technology Family LS
SN74LS221 特性
SN74LS221 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
SN74LS221D ACTIVE 0 to 70 3.00 | 1ku SOIC (D) | 16 50 | TUBE  
SN74LS221DE4 ACTIVE 0 to 70 3.00 | 1ku SOIC (D) | 16 50 | TUBE  
SN74LS221DG4 ACTIVE 0 to 70 3.00 | 1ku SOIC (D) | 16 50 | TUBE  
SN74LS221DR ACTIVE 0 to 70 2.50 | 1ku SOIC (D) | 16 2500 | LARGE T&R  
SN74LS221DRE4 ACTIVE 0 to 70 2.50 | 1ku SOIC (D) | 16 2500 | LARGE T&R  
SN74LS221DRG4 ACTIVE 0 to 70 2.50 | 1ku SOIC (D) | 16 2500 | LARGE T&R  
SN74LS221N ACTIVE 0 to 70 2.75 | 1ku PDIP (N) | 16 25 | TUBE  
SN74LS221NE4 ACTIVE 0 to 70 2.75 | 1ku PDIP (N) | 16 25 | TUBE  
SN74LS221 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
SN74LS221D Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS221D SN74LS221D
SN74LS221DE4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS221DE4 SN74LS221DE4
SN74LS221DG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS221DG4 SN74LS221DG4
SN74LS221DR Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS221DR SN74LS221DR
SN74LS221DRE4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS221DRE4 SN74LS221DRE4
SN74LS221DRG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74LS221DRG4 SN74LS221DRG4
SN74LS221N Pb-Free (RoHS)  CU NIPDAU  N/A for Pkg Type SN74LS221N SN74LS221N
SN74LS221NE4 Pb-Free (RoHS)  CU NIPDAU  N/A for Pkg Type SN74LS221NE4 SN74LS221NE4
SN74LS221 应用技术支持与电子电路设计开发资源下载
  1. SN74LS221 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)