9 Aug
2008
9 Aug
'08
5:26 p.m.
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;
http://homepages.nildram.co.uk/~wylie/ICs/monolith.htm
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