AMI 7838? (identify this part)
As Janka said in comments, this is a 2114 SRAM (more specifically, 2114L low-power version). The clues are:


2114 (2114L) in the part number
18-pin DIP package (I used 2114 devices in that 18-pin ceramic DIP package shown in the photo, as well as plastic DIP).
the date code of 7838 (YYWW format) on the top, matches the era of the 2114 (late 1970s to early 1980s)


The 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:


Fairchild 2114L datasheet
NEC uPD2114L datasheet




Update: Found the manufacturer - American Microsystems Inc. (AMI) who were later renamed AMI Semiconductors and then bought by ON Semi.


They used an S prefix before their part number, as seen in the S2114L2CC part number.
They had a packaging facility (to mount the silicon dies into the DIP packages) in Korea, which matches the marking in the photo.
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.