PDF datasheet of about 180 KB for the SFH506 series, with the _xx in the name standing for the carrier-frequency variants of the family. The SFH506 is an infrared remote-control receiver module that outputs demodulated data from a modulated IR signal. Technicians use it to check pinout, supply voltage and the frequency suffix when a TV, receiver or appliance ignores its remote. Replace a faulty module with one of the same carrier frequency, otherwise range suffers badly.
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.