16pin gold Flat pack ID help TA585 8221 1960's?

[1947transistor2012]

Hello again

I need Help Id'ing a part, unsure of the Mfr or function of part, possibly Aerospace?

TA series Mfr?

Part reads TA585 82 21

underneath are a set of 4 digit numbers that match that back of the gold Qfp. these 4 digit numbers change in example ,0402,0302, 0214,0318,0417..etc..etc..

Definitley not date codes or cap sizes all parts look the same

parts are stamped in blue ink and are stored in blue antistatic cases that were common in the early 60's.

I can try posting a pic...

I thought maybe Teledyne they have a TAG series for High Power Amplifiers.




Brian.

[1947transistor2012]

Part: TA585 8221 Mfr: ?
White ceramic gold 16pin gold QFP.
blue ink- packaging looks to be from 60's

Brian.

[1947transistor2012]

front of TA585 82 21

[chip68]

"TA" is a common Toshiba prefix. A photo would definitely help.

- CMW

[1947transistor2012]

oops....lol, I thought I posted pics of this chip.

Brian.
1947transistor2012

[debs3759]

You posted it while chips68 was typing

[1947transistor2012]

After searching on the internet and books, etc..

my assumption maybe Ti?

later 60's earlier 70's possibly?

Ti used blue ink on Aerospace chips and the packaging is common in the 60's... no Logo visable.

its quite possible alot of other Mfrs used blue ink on gold flat packs in the 60's-70's as well.


any thoughts?

Thanks again Brian.
1947transistor2012

[1947transistor2012]

Hello DEBS3759,

last time I spoke to you was in 2005-6


did you ever receive your free chips? ...lol.

Hope all is well.

Brian.
1947transistor2012

[debs3759]

That was so long ago that I don't remember

I see your C4004 grey trace is breaking records on eBay

[chip68]

[magictom]

[DaveC]

Having worked at CTS Micro in the early 70s, I think you might be looking at some sort of resistor network, probably thin film used for A/D ladder conversion. Have you used a ohm meter to check out readings from pin to pin. A/D used an R 2R 4R etc. if I remember correctly. The blue numbers might be individual device numbers for quality control and tracking. PMI/Precision Monolithics, Inc. I think used this kind of packaging. I've got their data sheets from that period and could check if you'd like. A 16 pin package like that could have 8 bits with the R 2R format which was a pretty difficult thing to achieve back then...10, 12, & 16 bits would be a major feat that might explain the expensive packaging.