4
\$\begingroup\$

Help appreciated identifying part and finding datasheet.

Top reads:

AMI 7838

S2114L2CC (might be a 5 not an S)

Bottom reads:

7835A1

1560

KOREA

18 pin ceramic DIP, gold plated? pins

top side

bottom side

\$\endgroup\$
  • 5
    \$\begingroup\$ Thats a 2114 SRAM. 1024x4 bits. \$\endgroup\$ – Janka Mar 11 '18 at 1:27
  • 1
    \$\begingroup\$ all that gold .... muuahhhaaahhhaaa \$\endgroup\$ – jsotola Mar 11 '18 at 4:34
11
\$\begingroup\$

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:


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.

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.