3) Finally I have what looks to be a specialized microprocessor (wild ass
guess). This would be an IMP (International Microelectronic Products)
I10412-01. It is a 28 pin SOIC. They are no longer in business as near as I
can tell. That isn't a Tek part. It is not a company I ever heard of. There
is virtually no reference to it anywhere on the internet except it might be
called a "daculator" (that is not a misprint as far as I know) and it might
be related to a Tek 156-6224-00. All Microprocessor, TTL, special function,
etc, etc chips start with 156-xxxx-yy but my Tek IC parts catalog stops
around 156-3000-yy so I have no information on it.
Hi Dennis,
Those daculators are in all of the later TDS500 TDS600, and all of the TDS700 scopes. 3 per unit. Pictures:
Google for the TDS520B service manual with the schematics and you'll see how they're used. It's a DAC with 16 analog outputs.
Schematic is on page 275. Do a text search for the word daculator in the manual for some theory.
