Datasheet labelled X6769B, an 887 KB PDF; the name gives only the part code with no manufacturer or device type stated. A component datasheet normally lists the pinout, absolute maximum ratings, electrical characteristics and typical application circuit, which is what you need when checking whether a chip is supplied correctly or finding a replacement. Compare the marking on the package with the code inside the document before relying on pin assignments, since similar codes can belong to different parts. Open it with any PDF reader.
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 @datasheets0. 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.