SN74AS645 具有三态输出的八路总线收发器
SN74AS645 描述
These octal bus transceivers are designed for asynchronous two-way communication between data buses. These devices transmit data from the A bus to the B bus or from the B bus to the A bus, depending on the level at the direction-control (DIR) input. The output-enable 
input can be used to disable the device so that the buses are effectively isolated.
The -1 version of the SN74ALS645A is identical to the standard version, except that the recommended maximum IOL is increased to 48 mA. There is no -1 version of the SN54ALS645A.
The SN74AS645 and SN74AS645 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS645A and SN74AS645 are characterized for operation from 0°C to 70°C
| SN74AS645 | |
| Voltage Nodes(V) | 5 |
| Vcc range(V) | 4.5 to 5.5 |
| Input Level | TTL |
| Output Level | TTL |
| Output Drive(mA) | -15/24 |
| No. of Outputs | 8 |
| Logic | True |
| Static Current | 50 |
| tpd max(ns) | 10 |
| Rating | Catalog |
| Technology Family | ALS |
SN74AS645 特性
- Bidirectional Bus Transceivers in High-Density 20-Pin Packages
- True Logic
- 3-State Outputs
- Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs
SN74AS645 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 |
| SN74AS645NSR | ACTIVE | 0 to 70 | 7.95 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R | |
| SN74AS645NSRE4 | ACTIVE | 0 to 70 | 7.95 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R | |
| SN74AS645NSRG4 | ACTIVE | 0 to 70 | 7.95 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R |
SN74AS645 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 |
| SN74AS645NSR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AS645NSR | SN74AS645NSR |
| SN74AS645NSRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AS645NSRE4 | SN74AS645NSRE4 |
| SN74AS645NSRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74AS645NSRG4 | SN74AS645NSRG4 |
SN74AS645 应用技术支持与电子电路设计开发资源下载
- SN74AS645 数据资料 dataSheet 下载.PDF
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