SN74ALS639A 八路总线收发器
SN74ALS639A 描述
These octal bus transceivers are designed for asynchronous two-way communication between open-collector and 3-state buses. The devices transmit data from the A bus (open-collector) to the B bus (3 state) or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (
) input can be used to disable the device so the buses are isolated.
The -1 version of SN74ALS638A is identical to the standard version, except that the recommended maximum IOL is increased to 48 mA.
The SN74ALS638A, SN74ALS639A, SN74AS638A, and SN74AS639 are characterized for operation from 0°C to 70°C
| SN74ALS639A | |
| Voltage Nodes(V) | 5 |
| Rating | Catalog |
| Technology Family | ALS |
SN74ALS639A 特性
- Bidirectional Bus Transceivers in High-Density 20-Pin Packages
- Choice of True or Inverting Logic
- A-Bus Outputs Are Open Collector; B-Bus Outputs Are 3 State
- Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic (N) 300-mil DIPs
SN74ALS639A 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 |
| SN74ALS639ANSR | ACTIVE | 0 to 70 | 7.95 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R | |
| SN74ALS639ANSRE4 | ACTIVE | 0 to 70 | 7.95 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R | |
| SN74ALS639ANSRG4 | ACTIVE | 0 to 70 | 7.95 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R |
SN74ALS639A 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 |
| SN74ALS639ANSR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74ALS639ANSR | SN74ALS639ANSR |
| SN74ALS639ANSRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74ALS639ANSRE4 | SN74ALS639ANSRE4 |
| SN74ALS639ANSRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74ALS639ANSRG4 | SN74ALS639ANSRG4 |
SN74ALS639A 应用技术支持与电子电路设计开发资源下载
- SN74ALS639A 数据资料 dataSheet 下载.PDF
- TI 德州仪器缓冲器、驱动器/收发器产品选型与价格 . xls
- CMOS 非缓冲反向器在振荡器电路中的使用 (PDF 951 KB)
- Semiconductor Packing Methodology (PDF 3005 KB)
- 逻辑产品选择指南 2006/2007 （修订版 Z）(4462KB)
- 标准线性和逻辑产品 5 分钟指南 (786KB)
- 了解和解释标准逻辑数据表
- LOGIC Pocket Data Book (PDF 6001 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- Logic Cross-Reference (PDF 2938 KB)
