Small 63.4 KB datasheet in PDF format, named SDLS204 with no device stated. The literature code style resembles Texas Instruments logic documentation, so the covered part must be confirmed from the title page. Brief sheets like this usually present a pinout, function table and core electrical characteristics. Use them to check which pins are inputs, outputs and supply while probing a suspect IC on a board. Make sure the chip marking agrees with the device listed before relying on any pin numbers.
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.