Hi Joe,
The 05370-60022 part number IDs this as the Arming Board from the HP 5370A/B
counter. The 1820-0753 is an ECL dual 3-input gate, the 1820-1999 is a
multiplexer, and the 1820-2000 is a D flip-flop. These are all ECL IC's, and
on each of them the two end pins are connected to the substrate and tied to
the -5.2 V bus. These two pins act as both power input and heat sinks for
the chip.
Stan
Message: 3
Date: Tue, 15 Jul 2003 15:54:54
To: cctalk_at_classiccmp.org
From: Joe <rigdonj_at_cfl.rr.com>
Subject: Re: Can anyone id these HP ICs? (Joe)
Reply-To: cctalk_at_classiccmp.org
Bingo! You're right. It's part number is 05370-60022. I had tried to
look up that number but all I found was a scanner with the same PN. Do you
have a service manual for this? If so, can you tell me what these parts
are? PNs 1820-0753, 1820-2000 and 1820-1999.
Joe
At 10:55 AM 7/15/03 -0700, you wrote:
>Hi Joe,
>
>Your board looks like one of the interpolator cards from an HP 5370A
Universal Time Interval Counter. Do you see an "05370-6xxxx" part number on
the board anywhere?
>
>
>Message: 14
>Date: Mon, 14 Jul 2003 17:52:26
>To: cctalk_at_classiccmp.org
>From: Joe <rigdonj_at_cfl.rr.com>
>Subject: Re: Can anyone id these HP ICs?
>Reply-To: cctalk_at_classiccmp.org
>
>Hi Ed,
>
> I posted a picture at
><http://home.cfl.rr.com/rigdon14/t-bird/hp-ic.jpg>.
>I unplugged the two ICs in the top RH corner and turned them over so that
>you can see the bottom and side of the ICs and the heat sink that the IC
>normally sits on. There is a depression in the bottom of the IC case and a
>rasied pad on the heatsink that fits into the depression. I've never seen
>anything like this before! Note the delay line (?) on the LH side of the
>card. Sorry I couldn't get a better picture. This is as close as I could
>get with my camera.
>
> Joe
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Received on Thu Jul 17 2003 - 22:26:00 BST
