Datasheet in PDF for the Rohm BD49101AEFS-M part, listed in the catalogue as a schematic type. The name gives only the manufacturer and part number, with no device it was taken from. A datasheet like this supplies pin assignments, operating ranges, timing and recommended application circuits. Repair technicians use it to check pin voltages on a suspect chip, confirm package and marking, and pick a correct replacement. Compare the suffix carefully, since variants differ."}
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 @datasheets1. 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.