SN74ALS666 具有三态输出的八路 D 类透明读回锁存器
These 8-bit D-type transparent latches are designed specifically for storing the contents of the input data bus, plus reading back the stored data onto the input data bus. In addition, they provide a 3-state buffer-type output and are easily utilized in bus-structured applications.
While the latch enable (LE) is high, the Q outputs of the SN74ALS666 follow the data (D) inputs. The Q\ outputs of the SN74ALS667 provide the inverse of the data applied to its D inputs. The Q or Q\ output of both devices is in the high-impedance state if either output-enable (OE1\ or OE2\) input is at a high logic level.
Read back is provided through the read-back control (OERB\) input. When OERB\ is taken low, the data present at the output of the data latches passes back onto the input data bus
| SN74ALS666 | |
| Voltage Nodes(V) | 5 |
| Technology Family | ABT |
| Rating | Catalog |
SN74ALS666 特性
- 3-State I/O-Type Read-Back Inputs
- Bus-Structured Pinout
- Choice of True or Inverting Logic
- SN74ALS666...True Outputs
- SN74ALS667...Inverted Outputs
- Preset and Clear Inputs
- Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic (NT) 300-mil DIPs
SN74ALS666 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 |
| SN74ALS666DW | ACTIVE | 0 to 70 | 12.00 | 1ku | SOIC (DW) | 24 | 25 | TUBE | |
| SN74ALS666DWE4 | ACTIVE | 0 to 70 | 12.00 | 1ku | SOIC (DW) | 24 | 25 | TUBE | |
| SN74ALS666DWG4 | ACTIVE | 0 to 70 | 12.00 | 1ku | SOIC (DW) | 24 | 25 | TUBE | |
| SN74ALS666DWR | ACTIVE | 0 to 70 | 10.00 | 1ku | SOIC (DW) | 24 | 2000 | LARGE T&R | |
| SN74ALS666DWRE4 | ACTIVE | 0 to 70 | 10.00 | 1ku | SOIC (DW) | 24 | 2000 | LARGE T&R | |
| SN74ALS666DWRG4 | ACTIVE | 0 to 70 | 10.00 | 1ku | SOIC (DW) | 24 | 2000 | LARGE T&R | |
| SN74ALS666NT | ACTIVE | 0 to 70 | 11.35 | 1ku | PDIP (NT) | 24 | 15 | TUBE | |
| SN74ALS666NTE4 | ACTIVE | 0 to 70 | 11.35 | 1ku | PDIP (NT) | 24 | 15 | TUBE |
SN74ALS666 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 |
| SN74ALS666DW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74ALS666DW | SN74ALS666DW |
| SN74ALS666DWE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74ALS666DWE4 | SN74ALS666DWE4 |
| SN74ALS666DWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74ALS666DWG4 | SN74ALS666DWG4 |
| SN74ALS666DWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74ALS666DWR | SN74ALS666DWR |
| SN74ALS666DWRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74ALS666DWRE4 | SN74ALS666DWRE4 |
| SN74ALS666DWRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74ALS666DWRG4 | SN74ALS666DWRG4 |
| SN74ALS666NT | Pb-Free (RoHS) | CU NIPDAU | Level-1-260C-UNLIM | SN74ALS666NT | SN74ALS666NT |
| SN74ALS666NTE4 | Pb-Free (RoHS) | CU NIPDAU | Level-1-260C-UNLIM | SN74ALS666NTE4 | SN74ALS666NTE4 |
SN74ALS666 应用技术支持与电子电路设计开发资源下载
- SN74ALS666 数据资料 dataSheet 下载.PDF
- TI 德州仪器触发器/锁存器/寄存器产品选型与价格 . 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)