26 Oct
2010
26 Oct
'10
1:53 p.m.
On 26 Oct 2010 at 12:02, Eric Smith wrote:
I haven't seen a 0.050 inch pitch DIP. Perhaps
you're referring to
the 0.070 inch pitch "Shrink-DIP", which was very common for a while
from Japanese vendors.
Yes, my error--e.g. HD64180-style package. I remember seeing the
same package in Japanese 70's era telephone answering machines.
The JEDEC 68-position ceramic leadless chip carriers
appeared around
1981, and Motorola offered the MC68000 in that package. The PLCC
appeared a few years later.
The ceramic LCC was at least known by 1981--we got early steppings of
the 186 and 286 in that configuration. With the 68K it was pretty
close in terms of timeframe.
--Chuck