PDF datasheet, 396 KB, with literature code SDLS201 as its only identifier. No part number is present in the name, but the SDLS pattern is the one Texas Instruments uses for logic literature, so a logic IC is likely; confirm by opening it. The document should give pinout, truth table, propagation delay and supply specifications. That is useful when tracing a digital signal path or checking whether a chip is driving correctly. Match the marking on the component to the part number inside.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @datasheet_technar_org. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.