Unidentified chip -- Spoiler for HP 1260-0339

[geneb]

On Thu, 6 Aug 2015, Eric Smith wrote:

> On Thu, Aug 6, 2015 at 10:22 AM, tony duell <ard at p850ug1.demon.co.uk> wrote:
>> Amazingly there is nothing inside that 16pin DIL package. No silicon chip, no thick-film resistor
>> network, nothing. It is just a package with the pins.
>
> Are you sure? They might have gotten a really good deal on
> house-marked Signetics 25120 chips, with not all of the address lines
> bonded out.

It could also be a chip used to test an auto-insertion machine or wave 
solder machine.  If memory serves, they'll use correctly pinned but "fake" 
parts to test those processes before moving to the more expensive real 
thing.

g.

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