Author Topic: Vintage TI 74xx series logic  (Read 3377 times)

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Offline @rtTopic starter

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Vintage TI 74xx series logic
« on: November 21, 2017, 04:55:30 am »
Hi Guys :)

I have a few more of these Texas Instruments logic chips on the way. The next one is a dual flip flop.
I was hoping to test them in in some kind of jig without soldering. They are a smaller package than I thought.

Does anyone have any idea, or even pics, of the type of sockets that would have been used to mount these?
Any more information? and do these markings suggest the 20th, and 21st week of 1973?
If these are date codes, the flip flop in the same kind of package is the 26th week of 1969, so the package must have existed for some time.
Thanks :)


 

Offline Tomorokoshi

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Re: Vintage TI 74xx series logic
« Reply #1 on: November 21, 2017, 06:19:28 am »
They would have been cut out of the carriers with pin lengths of perhaps 3/16" and surface mounted. Same pin spacing and body size as a SOIC.
 

Offline Benta

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Re: Vintage TI 74xx series logic
« Reply #2 on: November 21, 2017, 09:49:42 am »
Those are a bit odd. That type of package would normally be used for Mil/Aero kind of stuff, but in that case in extended temperature as SN54xx, not SN74xx.
Interesting, they would have been expensive back then.
 

Offline Canis Dirus Leidy

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Re: Vintage TI 74xx series logic
« Reply #3 on: November 21, 2017, 11:49:01 am »
Those are a bit odd. That type of package would normally be used for Mil/Aero kind of stuff, but in that case in extended temperature as SN54xx, not SN74xx.
According to their price list for 1966, then such packages were by default. If you wanted a plastic DIP plug-in package, then it needed to be specified ("Add the suffix "P" to the type number to order Series 74P in the plug-in package").
 

Offline @rtTopic starter

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Re: Vintage TI 74xx series logic
« Reply #4 on: November 21, 2017, 12:44:04 pm »
Cool doc! So they do have socketed boards for them then such as SN006A.
I take it for manufacturing these wouldn’t be used?

Why am I even doing this? :D It started with vintage ceramic CPUs that I would actually use in old computers,
and I guess I got carried away.
 

Offline Ampera

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Re: Vintage TI 74xx series logic
« Reply #5 on: November 21, 2017, 02:11:52 pm »
Cool doc! So they do have socketed boards for them then such as SN006A.
I take it for manufacturing these wouldn’t be used?

Why am I even doing this? :D It started with vintage ceramic CPUs that I would actually use in old computers,
and I guess I got carried away.

Chip collection is infectious.

Soon you will truly be one of us

one of us
one of us
one of-

alright I'll stop now.
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Offline @rtTopic starter

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Re: Vintage TI 74xx series logic
« Reply #6 on: November 21, 2017, 03:27:16 pm »
By one of us, you mean poor? Yeah that already happened :D
Part of me is already trying to restrain the other part from looking at vintage wafers.
 

Offline @rtTopic starter

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Re: Vintage TI 74xx series logic
« Reply #7 on: December 13, 2017, 05:14:41 am »
Looks like I do have a problem :D
Shame this one came in plastic bubblewrap.

 


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