6 Dec
2009
6 Dec
'09
8:14 p.m.
From the
timeframe of around '73 or so, my trail goes cold. ?Clearly,
Nitron must have
existed sometime into the 1980's, given the dating on
the chip you found. ?I have a ?Nitron single-chip calculator IC from '73
that is in a ceramic 40-pin dip with gold lid and pins.