27 Jan
2013
27 Jan
'13
8:43 p.m.
I have here an odd 7400 TTL chip - the prefix is TG. TG74S00J. Who was
this? Who made TG74xx TTL? It looks somewhat like an old Sylvania
ceramic DIP from the early 1970s. I have perhaps thought Transitron,
but it is not. And there is no logo, other than a plain looking T.
Ideas?
--
Will
27 Jan
27 Jan
9:03 p.m.
On Sun, 27 Jan 2013, William Donzelli wrote:
I have here an odd 7400 TTL chip - the prefix is TG.
TG74S00J. Who was
this? Who made TG74xx TTL? It looks somewhat like an old Sylvania
ceramic DIP from the early 1970s. I have perhaps thought Transitron,
but it is not. And there is no logo, other than a plain looking T.
Ideas?
Toshiba?
Mike Loewen mloewen at cpumagic.scol.pa.us
Old Technology http://sturgeon.css.psu.edu/~mloewen/Oldtech/
9:57 p.m.
On 01/27/2013 06:43 PM, William Donzelli wrote:
I have here an odd 7400 TTL chip - the prefix is TG.
TG74S00J. Who was
this? Who made TG74xx TTL? It looks somewhat like an old Sylvania
ceramic DIP from the early 1970s. I have perhaps thought Transitron,
but it is not. And there is no logo, other than a plain looking T.
My Moto 1968 interchangeability guide shows the TG7400E was a Transitron
product.
Does the "T" have a little curl on the left side of the crossbar?
That'd be Transitron.
--Chuck
10:13 p.m.
My Moto 1968 interchangeability guide shows the
TG7400E was a Transitron
product.
I think you may be right, but it does not look like a Transitron TTL
chip I have seen before. One wonders if Sylvania made it and it was
rebranded, just like in the tube days.
Does the "T" have a little curl on the left
side of the crossbar? That'd be
Transitron.
Not really, but it could be a bad printing job.
--
Will
10:15 p.m.
On 1/27/2013 7:57 PM, Chuck Guzis wrote:
On 01/27/2013 06:43 PM, William Donzelli wrote:
My Transitron designer's guide list the TG7400J but not a 74S00.
Bob
I have here an odd 7400 TTL chip - the prefix is
TG. TG74S00J. Who was
this? Who made TG74xx TTL? It looks somewhat like an old Sylvania
ceramic DIP from the early 1970s. I have perhaps thought Transitron,
but it is not. And there is no logo, other than a plain looking T.
My Moto 1968 interchangeability guide shows the TG7400E was a
Transitron product.
Does the "T" have a little curl on the left side of the crossbar?
That'd be Transitron.
--Chuck
10:16 p.m.
Here'e an eBay auction offering some Transitron flatpacks for sale.
Note the logo:
http://i.ebayimg.com/t/RARE-UNIQUE-1968-NOS-Transitron-Space-Program-Atlas-…
(ebay item 130733865880)
--Chuck
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bobalan＠sbcglobal.net -
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wdonzelli＠gmail.com