Hi Everyone,

My first post, though I've been lurking for awhile.
I recently returned to this hobby after about a 20 year hiatus and in going through my IC collection I've come across an IC which I can't find a datasheet for. It's a 7491 8 bit serial shift register. If anyone could tell me where to look for a sheet it would be appreciated.

thanks
charlie

 

Here you go:
http://www.classiccmp.org/rtellason/chipdata/sn7491.pdf

Texas Instruments prefixes it's 54/74 series TTL with SN. After the 54/74, you might also have L, S or LS, for (L)ow power and (S)chottky. The 7491 seems to have been obsolete for a good while.

 

Thankyou Sir,

I guess the IC is somewhat like the fellow who owns it. lol.

charlie