SN74LS123 可重触发单稳多频振荡器
These d-c triggered multivibrators feature output pulse-duration control by three methods. The basic pulse time is programmed by selection of external resistance and capacitance values (see typical application data). The '122 and 'LS122 have internal timing resistors that allow the circuits to be used with only an external capacitor, if so desired. Once triggered, the basic pulse duration may be extended by retriggering the gated low-level-active (A) or high-level-active (B) inputs, or be reduced by use of the overriding clear. Figure 1 illustrates pulse control by retriggering and early clear.
The 'LS122 and 'LS123 are provided enough Schmitt hysteresis to ensure jitter-free triggering from the B input with transition rates as slow as 0
| SN74LS123 | |
| Voltage Nodes(V) | 5 |
| Vcc range(V) | 4.75 to 5.25 |
| Input Level | TTL |
| Output Level | TTL |
| Rating | Catalog |
| Technology Family | LS |
SN74LS123 特性
- D-C Triggered from Active-High or Active-Low Gated Logic Inputs
- Retriggerable for Very Long Output Pulses, Up to 100% Duty Cycle
- Overriding Clear Terminates Output Pulse
- '122 and 'LS122 Have Internal Timing Resistors
SN74LS123 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 |
| SN74LS123D | ACTIVE | 0 to 70 | 3.00 | 1ku | SOIC (D) | 14 | 50 | TUBE | |
| SN74LS123DE4 | ACTIVE | 0 to 70 | 3.00 | 1ku | SOIC (D) | 14 | 50 | TUBE | |
| SN74LS123DG4 | ACTIVE | 0 to 70 | 3.00 | 1ku | SOIC (D) | 14 | 50 | TUBE | |
| SN74LS123DR | ACTIVE | 0 to 70 | 2.50 | 1ku | SOIC (D) | 14 | 2500 | LARGE T&R | |
| SN74LS123DRE4 | ACTIVE | 0 to 70 | 2.50 | 1ku | SOIC (D) | 14 | 2500 | LARGE T&R | |
| SN74LS123DRG4 | ACTIVE | 0 to 70 | 2.50 | 1ku | SOIC (D) | 14 | 2500 | LARGE T&R | |
| SN74LS123N | ACTIVE | 0 to 70 | 2.75 | 1ku | PDIP (N) | 14 | 25 | TUBE | |
| SN74LS123NE4 | ACTIVE | 0 to 70 | 2.75 | 1ku | PDIP (N) | 14 | 25 | TUBE |
SN74LS123 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 |
| SN74LS123D | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LS123D | SN74LS123D |
| SN74LS123DE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LS123DE4 | SN74LS123DE4 |
| SN74LS123DG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LS123DG4 | SN74LS123DG4 |
| SN74LS123DR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LS123DR | SN74LS123DR |
| SN74LS123DRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LS123DRE4 | SN74LS123DRE4 |
| SN74LS123DRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LS123DRG4 | SN74LS123DRG4 |
| SN74LS123N | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | SN74LS123N | SN74LS123N |
| SN74LS123NE4 | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | SN74LS123NE4 | SN74LS123NE4 |
SN74LS123 应用技术支持与电子电路设计开发资源下载
- SN74LS123 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)