Short datasheet of 55.8 KB in PDF format, catalogued as SDNS022B, a literature number with a revision letter appended. Nothing in the name identifies the part or its maker, so check the first page. Small datasheets like this typically cover simple logic or discrete parts and give the pinout, truth table or ratings and package dimensions, enough to test the device in circuit and confirm a replacement matches the original footprint.
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.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)