Microchip 24LC164 datasheet in PDF form, 115 KB, listed as a schematic in this index. The part is a 16 Kbit two-wire serial EEPROM from the cascadable line, so chip address pins and their strapping are an important part of the document, together with pinout, write timing and voltage limits. Use it to identify the memory on a board, verify SDA and SCL pull-ups and supply, and set up a programmer for reading or cloning. Compare with the 24LC174 sheet, a close relative.
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 @cyberlanelectonik. 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.