These data selectors/multiplexers contain full binary decoding to select one of eight data sources and feature strobe-controlled complementary outputs. The 3-state outputs can interface with and drive data lines of bus-organized systems. When the strobe (G\) input is high, both outputs are in a high-impedance state in which both the upper and lower transistors of each totem-pole output are off, and the output neither drives nor loads the bus significantly.

The SN54F251B is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F251B is characterized for operation from 0°C to 70°C.

D0, D1,...D7 = the level of the respective D input.

• 3-State Versions of SN54F151B and SN74F151B
• 3-State Outputs Interface Directly With System Bus
• Performs Parallel-to-Serial Conversion
• Complementary Outputs Provide True and Inverted Data
• Package Options Include Plastic Small-Outline Packages, Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs

• Technology Family
• F
• Function
• Digital Multiplexer
• Configuration
• 8:1
• Number of channels (#)
• 1
• Operating temperature range (C)
• 0 to 70
• Rating
• Catalog

SN74F251B的完整型号有：SN74F251BD、SN74F251BDR、SN74F251BN，以下是这些产品的关键参数及官网采购报价：

SN74F251BD，工作温度：0 to 70，封装：SOIC (D)-16，包装数量MPQ：40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SN74F251BD的批量USD价格：.384（1000+）

SN74F251BDR，工作温度：0 to 70，封装：SOIC (D)-16，包装数量MPQ：2500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SN74F251BDR的批量USD价格：.184（1000+）

SN74F251BN，工作温度：0 to 70，封装：PDIP (N)-16，包装数量MPQ：25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SN74F251BN的批量USD价格：.212（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。