The requested file:
https://pdf.datasheetcatalog.com/datasheet2/d/0kt17wkuygr8ht7w4tjy367kl6fy.pdf
is the data sheet for the following electronic components:

ST Microelectronics

#	Part Name	Description
1	M54HC4051	RAD-HARD SINGLE 8-CHANNEL ANALOG MULTIPLEXER/DEMULTIPLEXER
2	M54HC4051D	RAD-HARD SINGLE 8-CHANNEL ANALOG MULTIPLEXER/DEMULTIPLEXER
3	M54HC4051K	RAD-HARD SINGLE 8-CHANNEL ANALOG MULTIPLEXER/DEMULTIPLEXER
4	M54HC4051K1	RAD-HARD SINGLE 8-CHANNEL ANALOG MULTIPLEXER/DEMULTIPLEXER

Select the part name and then you can download the datasheet in PDF format.