23 Mar
2003
23 Mar
'03
2:55 a.m.
OK, it's a few decades late, but I've got a few dozen Motorola
chips from the early 70's that must be interesting to somebody:
MC679P
MC675P
MC669P
MC688P
etc., all 14-pin DIP packages. I think these were Motorola's DTL
line, but maybe they were really RTL - my brain cannot recall. Anyway,
they're free (I'll even pay shipping) to whoever wants them, first come,
first served.
Tim.
23 Mar
23 Mar
12:16 p.m.
New subject: Motorola DTL?RTL chips --> HTL
Those numbers are MHTL. +15V supply, high noise immunity. The MC669 is an expander. My
sources don't go beyond 674, so don't know what the others are.
--
I have read a fiery gospel writ in burnish`d rows of steel,
"As ye deal with my contemners, So with you my grace shall deal;"
Let the Hero, born of woman, crush the serpent with his heel
Send eMail to ----> grenaud(a)acm.org. For contact info, see:
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26 Mar
26 Mar
11:45 a.m.
On Sunday 23 March 2003 9:52 am, Tim Shoppa wrote:
OK, it's a few decades late, but I've got a
few dozen Motorola
chips from the early 70's that must be interesting to somebody:
MC679P
MC675P
MC669P
MC688P
According to my '68 databook, these devices are MHTL,
a high threshold variant of DTL. They use a 15 V powersupply,
a logic '1' has to be at least 8V. Propagation delay for simple
gates is around 125 nS.
jos dreesen
7949
days inactive
7952
days old
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