A 116 KB summary datasheet for the tiny11 and tiny12, consistent with the Atmel AVR ATtiny11 and ATtiny12 small 8-pin microcontrollers. The s suffix marks the short version, which usually holds the feature list, pinout, register summary and ordering codes only. Technicians can use it to identify pin roles quickly when probing an older board using one of these parts. Note that detailed programming and electrical data are found in the full datasheet, and the chip marking should be checked to tell which of the two parts is fitted.
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. 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.