The 74AC251 is a high-speed 8-input digital multiplexer.
It provides, in one package, the ability to select one bit of
data from up to eight sources. It can be used as universal function generator to generate any logic function of four variables. Both true and complementary outputs are provided.
ICC reduced by 50%
On-chip select logic decoding
Inverting and noninverting 3-STATE outputs
Outputs source/sink 24 mA
16 pin DIP. Actual brand may vary from picture.