The datasheet PDF doesn't contain an obvious date, but it's is clearly scanned and it also contains a sample circuit for connecting it to an IBM PC via the ISA bus. So somewhere between 1981 and 1995, perhaps.
There's a document id on the last page that may indicate it's from 89.
There's a document id on the last page that may indicate it's from 89.
https://www.analog.com/media/en/technical-documentation/data...