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
- Dual Versions of Highly Stable SN54121 and SN74121 One Shots
- SN54221 and SN74221 Demonstrate Electrical and Switching Characteristics That Are Virtually Identical to the SN54121 and SN74121 One Shots
- Pinout Is Identical to the SN54123, SN74123, SN54LS123, and SN74LS123
- Overriding Clear Terminates Output Pulse
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
- SN74LS221 数据资料 dataSheet 下载.PDF
- TI 德州仪器特殊逻辑产品选型与价格 . xls
- Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
- Understanding and Interpreting Standard-Logic Data Sheets (PDF 857 KB)
- TI IBIS File Creation, Validation, and Distribution Processes (PDF 380 KB)
- Implications of Slow or Floating CMOS Inputs (PDF 101 KB)
- CMOS Power Consumption and CPD Calculation (PDF 89 KB)
- Designing With Logic (PDF 186 KB)
- Live Insertion (PDF 150 KB)
- Input and Output Characteristics of Digital Integrated Circuits (PDF 1708 KB)
- Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (PDF 43 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- LOGIC Pocket Data Book (PDF 6001 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- Logic Cross-Reference (PDF 2938 KB)