数据：
Quad 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 数据表 
这些数据选择器/多路复用器设计用于将来自4位数据源的信号复用到总线组织系统中的4输出数据线。当输出使能时，三态输出不加载数据线（
）输入处于高逻辑电平。
SN54ALS257A和SN54ALS258A的特点是可在整个军队中运行温度范围为-55°C至125°C。 SN74ALS257A，SN74ALS258A，SN74AS257和SN74AS258的工作温度范围为0°C至70°C。
| Function |
| Technology Family |
| VCC (Min) (V) |
| VCC (Max) (V) |
| Channels (#) |
| Voltage (Nom) (V) |
| F @ Nom Voltage (Max) (Mhz) |
| ICC @ Nom Voltage (Max) (mA) |
| tpd @ Nom Voltage (Max) (ns) |
| Configuration |
| Type |
| IOL (Max) (mA) |
| IOH (Max) (mA) |
| Rating |
| Operating Temperature Range (C) |
| Package Group |
| Package Size: mm2:W x L (PKG) |
| Bits (#) |
| Digital input leakage (Max) (uA) |
| ESD Charged Device Model (kV) |
| ESD HBM (kV) |
| SN74AS258 |
|---|
| Encoder Multiplexer |
| AS |
| 4.5 |
| 5.5 |
| 4 |
| 5 |
| 125 |
| 25.2 |
| 8 |
| 2:1 |
| 3-State Output |
| 48 |
| -15 |
| Catalog |
| 0 to 70 |
| PDIP SO |
| See datasheet (PDIP) 16SO: 80 mm2: 7.8 x 10.2(SO) |
| 2 |
| 5 |
| 0.75 |
| 2 |
| 无样片 |
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