This device is designed to multiplex signals from 4-bit data sources to four output data lines in bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (OE\) input is at a high logic level.

To ensure the high-impedance state during power up or power down, OE\ should be tied to V_CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

• 3-State Outputs Interface Directly With System Bus
• Flow-Through Architecture Optimizes PCB Layout
• Center-Pin VCC and GND Configurations Minimize High-Speed Switching Noise
• 500-mA Typical Latch-Up Immunity at 125°C
• Provides Bus Interface From Multiple Sources in High-Performance Systems

• Technology Family
• AC
• Function
• Encoder, Multiplexer
• Configuration
• 2:1
• Number of channels (#)
• 4
• Operating temperature range (C)
• -40 to 85
• Rating
• Catalog

74AC11257的完整型号有：74AC11257DW、74AC11257N、74AC11257PW，以下是这些产品的关键参数及官网采购报价：

74AC11257DW，工作温度：-40 to 85，封装：SOIC (DW)-20，包装数量MPQ：25个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网74AC11257DW的批量USD价格：1.435（1000+）

74AC11257N，工作温度：-40 to 85，封装：PDIP (N)-20，包装数量MPQ：20个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：NIPDAU，TI官网74AC11257N的批量USD价格：1.65（1000+）

74AC11257PW，工作温度：-40 to 85，封装：TSSOP (PW)-20，包装数量MPQ：70个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网74AC11257PW的批量USD价格：1.435（1000+）

14-24-LOGIC-EVM 支持 14 到 24 引脚 PW、DB、D、DW、NS、DYY 和 DGV 封装的通用逻辑 EVM

该 EVM 设计用于支持采用 14 至 24 引脚 D、DW、DB、NS、PW、DYY 或 DGV 封装的任何逻辑器件。