Obsolete chips

[Jeff Erwin]

>
> Message: 1
> Date: Sat, 01 Mar 2008 00:31:26 -0800
> From: "Chuck Guzis" <cclist at sydex.com>
> Subject: Re: Source for TTL chips
> To: "General Discussion: On-Topic and Off-Topic Posts"
>        <cctalk at classiccmp.org>
> Message-ID: <47C8A3DE.23896.8B3FACB at cclist.sydex.com>
> Content-Type: text/plain; charset=US-ASCII
>
> On 1 Mar 2008 at 1:35, Michael Lee wrote:
>
> > For small amounts I use Jameco Electronics...
>
> Where does one go to find the not-very-common TTL?  e.g., the 7497
> rate multiplier; the 74199 8-bit register, etc.  TI had some pretty
> estoteric circuits also--74LS362, 74LS444, 74S485, 74S481...
>
> Cheers,
> Chuck
>
>
>
I have the same issue.  I need three obsolete chips from National Semi, DM
8131, DM 8836 and DM 8837.  I have scoured the internet with no luck.

I do have a board with these chips in it, I may have to resort to
desoldering them. I just hate doing that, it tends to ruin the source board.