Forums :: Resources :: Features :: Photo Gallery :: Vintage Radio Shows :: Archives
Support This Site: Contributors :: Advertise


It is currently Dec Sun 15, 2019 8:00 pm


All times are UTC [ DST ]





Post New Topic Post Reply  [ 8 posts ] 
Author Message
 Post subject: IC Chips Can't Find Any Information On Them
PostPosted: Oct Fri 25, 2019 6:02 pm 
Member

Joined: Jan Mon 17, 2011 2:10 am
Posts: 203
Location: Revere,Massachusetts U.S.A.
Hi Forum, I've had these IC Chips for over 20 years and can never find any information on them, I think they belong to "Fairchild " but not sure. Any help would be appreciated, I'm going to attach an MS Word.doc with the numbers.
Any help or information would be appreciated.
Tony


Attachments:
Unknown IC Chips.docx [11.36 KiB]
Downloaded 53 times
Unknown IC Chips.docx [11.36 KiB]
Downloaded 12 times
Top
 Profile  
 
 Post subject: Re: IC Chips Can't Find Any Information On Them
PostPosted: Oct Fri 25, 2019 7:55 pm 
Member
User avatar

Joined: May Wed 18, 2011 2:40 am
Posts: 4250
Location: Littleton, MA
These are your chip numbers:
Quote:
F-U5B-7741393-7030
F-CUL-995879-838
612—LU315K
544-LU315K
F-U5B-770939-6930
F-U5B-771039-7017
7039-N5741T (7039-N574IT)
F-U5B7710316836
550-SU306K
628-SU306K
612-SU320K
F-CUL-998979-6832
620-LU332K


F-U5B-7741393-7030 => µA741 opamp
F-U5B-770939-6930 => µA709 opamp
F-U5B-771039-7017 => µA710 high speed comparator
F-U5B7710316836 => µA 710 high speed comparator

I would guess that 7039-N5741T (7039-N574IT) is also a 741 opamp, but who knows?

_________________
Steve Byan http://www.byan-roper.org/steve/steve-at-play/


Top
 Profile  
 
 Post subject: Re: IC Chips Can't Find Any Information On Them
PostPosted: Oct Fri 25, 2019 10:42 pm 
Member

Joined: Jan Mon 17, 2011 2:10 am
Posts: 203
Location: Revere,Massachusetts U.S.A.
Hi Steve, Thank You for the help & information, could you tell me how you found out the info?
Thanks Tony


Top
 Profile  
 
 Post subject: Re: IC Chips Can't Find Any Information On Them
PostPosted: Oct Sat 26, 2019 5:24 am 
Member

Joined: Jan Tue 16, 2007 7:02 am
Posts: 3268
Location: Lexington, KY USA
The SUxxx and LUxxx parts may be Signetics Utilogic series logic gates. The date codes would be mid 1960s.

If these are in plastic packages, they are probably rather grey in color, because Signetics initially used Dow Corning silicone resin, instead of epoxy.

Google found them here:

https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19680020054.pdf

Ted


Top
 Profile  
 
 Post subject: Re: IC Chips Can't Find Any Information On Them
PostPosted: Oct Sat 26, 2019 1:58 pm 
Member
User avatar

Joined: May Wed 18, 2011 2:40 am
Posts: 4250
Location: Littleton, MA
transoceanic 8523 wrote:
Hi Steve, Thank You for the help & information, could you tell me how you found out the info?

It's the pre-1973 order code for Fairchild Semiconductor integrated circuits. A pre-1973 Fairchild databook would have the complete info. I don't know the full details myself. Here's how "F-U5B-7741393-7030" breaks down:

F - Fairchild
-
U5B - I think this means "linear integrated circuit"
-
7 - I don't know what the first "7" means
741 - three-digit part number
393 - package type and temperature range
-
7030 - date code - 30th week of 1970

_________________
Steve Byan http://www.byan-roper.org/steve/steve-at-play/


Top
 Profile  
 
 Post subject: Re: IC Chips Can't Find Any Information On Them
PostPosted: Oct Sat 26, 2019 3:28 pm 
Member

Joined: Jan Mon 17, 2011 2:10 am
Posts: 203
Location: Revere,Massachusetts U.S.A.
Thank You Again, Steve, I have downloaded information regarding pre-1973 semiconductors that Fairchild offered, also will look into Sigetics Utilogic as well. There are times when I research "Vintage Electronics" I become somewhat depressed, I have just turned 60 this past September and so I grew up with Zenith, RCA, Fairchild ......so many more AMERICAN electronic giants.
Now if you ask anyone under the age of 40 about Zenith or RCA they ask if they are made in China?

Well sorry about the rant it's just that someday no one will ever again understand that we led the world in all forms of technology.
Tony


Top
 Profile  
 
 Post subject: Re: IC Chips Can't Find Any Information On Them
PostPosted: Oct Mon 28, 2019 10:57 pm 
Member
User avatar

Joined: Jun Wed 08, 2011 2:33 am
Posts: 9552
Location: Ohio 45177
I have bunches of old ICs that I will never use. I had a tub full of TTL chips that had been setting around for years, I spilled them and just vacuumed them all up instead of messing with them. I have some like these. The lower right IC is a custom display driver and the type was being offered for sale for 10,000 by a vendor when it was phased out. Maybe make a tie tack out of it.


Attachments:
DSCN2786.JPG
DSCN2786.JPG [ 305.35 KiB | Viewed 380 times ]

_________________
Reddy Kilowatt says; You smell smoke? Sorry about that!
Top
 Profile  
 
 Post subject: Re: IC Chips Can't Find Any Information On Them
PostPosted: Oct Tue 29, 2019 3:38 am 
Member

Joined: Jun Sun 15, 2014 5:37 pm
Posts: 167
Some ICs have longer life than otgers, but yes, as time goes by for a lot of purposes there are newer devices that do the same thing but better.

Foety years ago I got some uA702 opamps at a hamfest cheap, I can't remember if they were in with other things, or I had no idea what they were. They were important since they were early IC ooamps, but superseded by the 709 and moreso by the 741. Then later, even better opamps that were still cheap.

A lot of logic ICs aren't worth keeping, though I hang on to ttl even though I suspect I'd more likely use something with less current drain.

A lot if linear ICs have been replaced, though some like the 555 and really common opamps survive.

But every so often there are devices that are out of production but weren't replaced. I think of rf-related ICs, some which neve r seemed to get much commercial use (either because the need wasn't there or non-consumer equioment were never made in large quantities. Later, other ideas or greater integration came along and now SDR takes over. But for the hobbyist some key linear ICs can still be useful, mixers, IF amplifiers, things like tgat.

Michael


Top
 Profile  
 
Post New Topic Post Reply  [ 8 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: w3jn and 9 guests



Search for:
Jump to:  




























Privacy Policy :: Powered by phpBB