On Saturday 13 October 2007 15:56, Brent Hilpert wrote:
"Roy J. Tellason" wrote:
On Saturday 13 October 2007 10:46, dwight elvey
wrote:
Package size was always a dominating cost and
defined many projects.
I've often wondered why it is that 14-pin packages seemed to dominate the
early parts so much. Why they never offered, for example, a dual
2-input gate package instead of the more common quad, or other
combinations like that. It seemed sometimes that things were altered a
bit to fit into those 14-pin packages that they wanted to use...
There was a brief period (early-mid 60s) were packaging was as you suggest,
early RTL ICs were in 8 or 10 pin cans and flat-paks with typically two
gates per package. As densities increased there was little point though,
when building systems with hundreds or thousands of gates, 2-gates per
package just increased the package count and the potential wastage of 2
unused gates in a quad pack just wasn't a concern.
I was just thinking more along the lines of when you only need some of what's
in a typical package...
And what's funny is that there now seems to be some stuff out there that's
offering as simple as single gates in a small surface-mount package.
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, ?a critter that can
be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin