Flat Packs (Forgotten PC History)

Scanning steven.alan.canning at verizon.net
Sat Aug 9 19:26:38 CDT 2008

Mine were like Chuck's and always ceramic but could be black or gray and
always had gold leads. Mostly TTL and some 4000 Series CMOS. They conformed
to MIL-STD-1835C and cost a lot. If you want to see the progression in
packaging of ICs from 1960 forward check out;

Best regards, Steven

> On 9 Aug 2008 at 9:06, jd wrote:
> > I've seen a few things with flat packs and have had a few of the
> > little critters myself. Most were from Fairchild. Some didn't have the
> > maker's logo and some weren't marked at all.
> >
> > THey were typically white ceramic packages with gold lids and gold
> > leads. They are either square, rectangular or round, with 2, 4, 6,
> > 8--up to 20 leads.
> Here's a nice exhibit:
> http://www.vintchip.com/flatpack.html
> The ones I used were ceramic, but black/gray not white.  No lids,
> gold leads.  Typical of these was the 723 JK flip-flop--probably
> because of defense spending, easier to get and cheaper than the
> plastic DIP or TO-99 package, if you could find them.
> The original flatpacks, I believe, came from TI.  DIPs came later.
> Cheers,
> Chuck

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