SN74121 具有施密特触发器输入的单稳态多频振荡器

These multivibrators feature dual negative-transition-triggered inputs and a single positive-transition-triggered input which can be used as an inhibit input. Complementary output pulses are provided.

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 the B input allow jitter-free triggering from inputs with transition rates as slow as 1 volt/second, providing the circuit with an excellent noise immunity of typically 1.2 volts. A high immunity to VCC noise of typically 1.5 volts is also provided by internal latching circuitry.

Once fired, the outputs are independent of further transitions of the inputs and are a function only of the timing components

SN74121
Voltage Nodes(V) 5  
Vcc range(V) 4.75 to 5.25  
Input Level TTL  
Output Level TTL  
Rating Catalog  
Technology Family TTL  
SN74121 特性
SN74121 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
SN74121D ACTIVE 0 to 70 3.00 | 1ku SOIC (D) | 14 50 | TUBE  
SN74121DE4 ACTIVE 0 to 70 3.00 | 1ku SOIC (D) | 14 50 | TUBE  
SN74121DG4 ACTIVE 0 to 70 3.00 | 1ku SOIC (D) | 14 50 | TUBE  
SN74121DR ACTIVE 0 to 70 2.50 | 1ku SOIC (D) | 14 2500 | LARGE T&R  
SN74121DRE4 ACTIVE 0 to 70 2.50 | 1ku SOIC (D) | 14 2500 | LARGE T&R  
SN74121DRG4 ACTIVE 0 to 70 2.50 | 1ku SOIC (D) | 14 2500 | LARGE T&R  
SN74121N ACTIVE 0 to 70 2.75 | 1ku PDIP (N) | 14 25 | TUBE  
SN74121NE4 ACTIVE 0 to 70 2.75 | 1ku PDIP (N) | 14 25 | TUBE  
SN74121 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
SN74121D Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74121D SN74121D
SN74121DE4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74121DE4 SN74121DE4
SN74121DG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74121DG4 SN74121DG4
SN74121DR Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74121DR SN74121DR
SN74121DRE4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74121DRE4 SN74121DRE4
SN74121DRG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN74121DRG4 SN74121DRG4
SN74121N Pb-Free (RoHS)  CU NIPDAU  N/A for Pkg Type SN74121N SN74121N
SN74121NE4 Pb-Free (RoHS)  CU NIPDAU  N/A for Pkg Type SN74121NE4 SN74121NE4
SN74121 应用技术支持与电子电路设计开发资源下载
  1. SN74121 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)