Help appreciated identifying part and finding datasheet.
S2114L2CC (might be a 5 not an S)
18 pin ceramic DIP, gold plated? pins
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As Janka said in comments, this is a 2114 SRAM (more specifically, 2114L low-power version). The clues are:
2114L) in the part number
7838(YYWW format) on the top, matches the era of the 2114 (late 1970s to early 1980s)
AMI mark in the part number isn't American Megatrends Inc. (the BIOS manufacturer often referred to as "AMI"), as they aren't a semiconductor manufacturer.
However, I haven't found definitive evidence which company used that mark - I thought it might have been AMI Semiconductors (later taken over by ON Semi) but I'm not sure. [Found more details about the manufacturer - yes, it's the predecessor to AMI Semiconductors - see update below.]
Example 2114 SRAM datasheets from other manufacturers:
Update: Found the manufacturer - American Microsystems Inc. (AMI) who were later renamed AMI Semiconductors and then bought by ON Semi.
Sprefix before their part number, as seen in the
I found the datasheet for that device - but it's in a 20.6 MB PDF file:
American Microsystems Inc. (AMI) MOS Products Catalogue, Winter 1979
See page 35 in the PDF file (marked page number "2.4") which includes the
S2114L-2 which I suspect is correct for that device (the
-2 indicates a speed rating).
For different formats of that scanned AMI data book, see the archive.org page here.