[sdiy] Weird old logic chips & transistors

[Roy J. Tellason]

On Saturday 03 December 2005 07:08 pm, Scott Gravenhorst wrote:
> Motorola marketed their version of CD4xxx CMOS ICs as MC14xxx, so the MC
> prefix alone isn't enough to resolve down to MECL or whatever.

Right.  That's because they'd already used the MC4xxx numbers for one of their 
TTL series.  I've only ever actually encountered one of those parts,  the 
MC4044 that was used in some versions of the C64 computer.  The book I 
mentioned calls it a "phase-frequency detector" and it was used in 
conjunction with a 74LS629 dual VCO.

> "Roy J. Tellason" <rtellason at blazenet.net> wrote:
> >On Saturday 03 December 2005 06:47 pm, Mike Brown wrote:
> >> I had a bunch of motorola logic chips with the MC prefix, which I was
> >> told were MECL logic.
> >>
> >> they were ancient... definitely pre TTL.
> >>
> >> MB
> >
> >Motorola used that prefix for a bunch of different series including ECL,
> > DTL, RTL,  and several different series of TTL before the 7400 stuff took
> > over the market.  There were several different series of ECL,  too,  now
> > that I think of it.
> >
> >Never had the least inclination to try and work with ECL,  nohow.
> >
> >--
> >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
>
> ---------------------------------------------------------
> - Where merit is not rewarded, excellence fades.
> - Hydrogen is pointless without solar.
> - What good are laws that only lawyers understand?
> - The media's credibility should always be questioned.
> - The only good terrorist is a dead terrorist.
> - Governments do nothing well, save collect taxes.
>
> -- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
> -- Linux Rex         | RedWebMail by RedStarWare
> -- FatMan: home1.gte.net/res0658s/fatman/
> -- NonFatMan: home1.gte.net/res0658s/electronics/
> -- Autodidactic Master of Arcane and Hidden Knowledge.

-- 
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