4 Sep
2012
4 Sep
'12
12:12 a.m.
I wrote:
The one oddball I've seen was marked MC6809ELDS,
with an MB2 mask and
8417 date code. I've never found out what the deal is with the "LDS"
suffix, or the oddball mask code.
Checking an older datasheet reveals that in this case "L" is the usual
ceramic package designation, "D" is level 2 reliability screening, which
is a 168 hour burn-in at 125C, and "S" is level 1 screening, which is 10
temp cycles from -25C to 150C, and a high-temp test at max Tamb. "D"
and "S" may be used separately, or combined. The "S" in this position
is should not be confused with an "S" package code, which is Cerdip.
Someone sent me a link to a photo of a plastic "DS" suffix part.
It's still odd that this particular part had an MB2 mask with 8417
datecode. I haven't ever seen the MB2 mask on another 6809E, and
Motorola was using the EN6 mask from at least 8232 through 8633, so it
is strange that they would have made the same part with a different mask
set in the middle of that date range.
Eric