Message-ID: <004301c1df44$a5254d60$0700000a@parissn2>
From: "Stewart Nelson" <sn@scgroup.com>
To: rsgb_lf_group@blacksheep.org
References: <2493222.1018278457301.JavaMail.computernetworks@gomailjtp05> <3CB1F134.D406289A@virgin.net>
Subject: LF: Re: MC8309P
Date: Mon, 8 Apr 2002 23:30:45 +0200
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Hi Stewart,

This is a Motorola TTL dual 4-input mux, originally from Fairchild.
The 9300 series is same spec, except only 0 to 70 degree temp,
probably adequate for your purpose, and much easier to find.
Datasheet at http://www.national.com/pf/93/9309.html .

If you can't even find that, you might be able to kludge in
a 74153 (or modern equivalent), if the dual-polarity outputs
are not used, and you're willing to adapt the different pinout.

If all else fails, use two 74151 or similar, or program a PAL
or GAL.

73,

Stewart

----- Original Message ----- 
From: "Stewart Bryant" <stewart.bryant@virgin.net>
To: <rsgb_lf_group@blacksheep.org>
Sent: Monday, April 08, 2002 9:36 PM
Subject: LF: MC8309P


> A friend and I are trying to repair an old HP counter (HP 5345A).
> One of its faults is a failed HP 1820-0610 , which has the commercial
> equivalent MC8309P. Does anyone on this list know a reasonably priced
> source of MC8309P?.
> 
> Alternatively, I understand that this is a TTL part of some description,
> and I was wondering if it could be functionally replaced with one
> or more modern faster parts. However I do not have a data sheet,
> and cannot find one on the web. Does anyone on the list know where
> I can find a datasheet?
> 
> Many thanks
> 
> Stewart G3YSX
> 
> 
> 
> 
>