SN74LS423 双路可重触发单稳多频振荡器
The 'LS422 and 'LS423 are identical to 'LS122 and 'LS123 except they cannot be triggered via clear.
These d-c triggered multivibrators feature output-pulse-width control by three methods. The basic pulse time is programmed by selection of external resistance and capacitance values (see typical application data). The 'LS422 contains an internal timing resistor that allows the circuits to be used with only an external capacitor, if so desired. Once triggered, the basic pulse width 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 'LS422 and 'LS423 have enough Schmitt hysteresis to ensure jitter-free triggering from the B input with transition rates as slow as 0.
| SN74LS423 | |
| Voltage Nodes(V) | 5 |
| Vcc range(V) | 4.75 to 5.25 |
| Input Level | TTL |
| Output Level | TTL |
| Rating | Catalog |
| Technology Family | LS |
SN74LS423 特性
- Will Not Trigger from Clear
- 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
- 'LS422 Has Internal Timing Resistor
SN74LS423 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 |
| SN74LS423D | ACTIVE | 0 to 70 | 3.00 | 1ku | SOIC (D) | 16 | 50 | TUBE | |
| SN74LS423DE4 | ACTIVE | 0 to 70 | 3.00 | 1ku | SOIC (D) | 16 | 50 | TUBE | |
| SN74LS423DG4 | ACTIVE | 0 to 70 | 3.00 | 1ku | SOIC (D) | 16 | 50 | TUBE | |
| SN74LS423DR | ACTIVE | 0 to 70 | 2.50 | 1ku | SOIC (D) | 16 | 2500 | LARGE T&R | |
| SN74LS423DRE4 | ACTIVE | 0 to 70 | 2.50 | 1ku | SOIC (D) | 16 | 2500 | LARGE T&R | |
| SN74LS423DRG4 | ACTIVE | 0 to 70 | 2.50 | 1ku | SOIC (D) | 16 | 2500 | LARGE T&R | |
| SN74LS423N | ACTIVE | 0 to 70 | 2.75 | 1ku | PDIP (N) | 16 | 25 | TUBE | |
| SN74LS423NE4 | ACTIVE | 0 to 70 | 2.75 | 1ku | PDIP (N) | 16 | 25 | TUBE |
SN74LS423 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 |
| SN74LS423D | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LS423D | SN74LS423D |
| SN74LS423DE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LS423DE4 | SN74LS423DE4 |
| SN74LS423DG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LS423DG4 | SN74LS423DG4 |
| SN74LS423DR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LS423DR | SN74LS423DR |
| SN74LS423DRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LS423DRE4 | SN74LS423DRE4 |
| SN74LS423DRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74LS423DRG4 | SN74LS423DRG4 |
| SN74LS423N | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | SN74LS423N | SN74LS423N |
| SN74LS423NE4 | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | SN74LS423NE4 | SN74LS423NE4 |
SN74LS423 应用技术支持与电子电路设计开发资源下载
- SN74LS423 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)
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- 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)
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