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List:       classiccmp
Subject:    Re: Waht is an MC1806 ?
From:       "Dwight K. Elvey" <dwight () ca2h0430 ! amd ! com>
Date:       2005-10-31 17:03:49
Message-ID: 200510311703.JAA04437 () ca2h0430 ! amd ! com
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Hi Tony
 I would guess that it is the same as a TI 806 DTL.
I don't have a data book for that but it seems like I
found one on the web someplace when I was looking at
some of the DTL's in my Nicolet computer.
Dwight

>From: ard@p850ug1.demon.co.uk
>
>The Subject: line says it all really, but perhaps I should give a little 
>more explanation.
>
>I am working on an HP59405, which is the HPIB interface for the HP9830 
>'calculator'. On the PCB are 2 chips which cross to something called an 
>MC1806. This is not in any of my Motorola databooks.
>
>What I have determined (I think) so far : 
>
>1) 14 pin DIL package, power on 14, ground on 7 as usual.
>
>2) Seems to be a quad 2-input device, pinout as the 7400 -- that is, 
>inputs on 1 and 2, output on 3, etc.
>
>3) Seems to be DTL in that the output directly drives the base of an NPN 
>transsistor, the emitter of which is grounded.
>
>4) The most logical (!) function would be a quad 2 input NOR gate. Maybe 
>an AND gate?
>
>Does anyone have a databook that lists it?
>
>-tony
>
>


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