This part is a kind of semiconductor called 74131.

Function of this product has 1-of-8 inverting decoder/demultiplexer with address register.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

74131 1-of-8 inverting decoder/demultiplexer with address register. +--+ S0 |1 +--+ 16| VCC S1 |2 15| /Y0 S2 |3 CLK |4 14| /Y1 74 13| /Y2 /EN2 |5 131 12| /Y3 EN1 |6 11| /Y4 /Y7 |7 GND |8 10| /Y5 9| /Y6 +--+ [ ... ]

74131 PDF Datasheet Download