19 Feb
2022
19 Feb
'22
10:28 a.m.
On 2/18/22 21:43, ben via cctalk wrote:
The 70's was all low scale tech. I suspect it was the high
speed/edge rates more the power that kept ECL from common
use. Any other views on this topic. Ben, who only had
access to RADIO SHACK in the 70's.
PS: Still grumbling about buying life time tubes at a big
price,
just to see all tubes discontinued a year or two later.
Edge rates on pedestrian MECL 10K were not crazy fast.? Rise
and fall of about 1 ns, but the gate propagation delay was
ALSO about 1 ns, so that was a lot faster than TTL.? ECL was
very easy to work with, crosstalk was not a common issue.?
But, you HAD to terminate any line over a foot, and better
to make it 6" to be sure.? And, the termination and pulldown
resistors ate a LOT of power!
Jon