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Re: Was Chip carrier now sockets



Thanks
Makes sense now
Grumpy
  They raised the Hunley today.  First sub to sink another ship in time of
war.


> Bruce Plecan wrote:
> > What exactly are you doing / making?.
> > I'm lost here
> > Grumpy
> The 1227748 ECM is a P4, but uses a bare socket and one of those black
> plastic clips, like a 747, instead of a memcal, like the other P4s.
> It's also a 28 pin socket instead of a 24 like the 747.  On a 747 you
> can remove the funny GM socket and put in a ZIF, but on the 748 the
> holes are .475 inches apart rather than .6 inches, so a regular socket
> won't fit.  Steve is making a little PC board with holes at .475 and
> .6", as an adapter, so you can put a regular socket in.  Seems like they
> might only be useful for the 1227748, though.
> --steve
> > > Hmm, with out measuring my 7747, I had some spare in^2 on some PCBs I
was
> > > having made, so I made some 0.6" to 0.4" and 0.5" adaptors.  As you
know,
> > > my 7747s don't need them :-)  As long as I was doing it, I put a pad
for a
> > > 1206 surface mount deglitching cap and a power LED (to warn you not to
> > > pull the chip w/ led on).  Now I see that the real dimension is 0.475.
> > > Well, I'll have 24 of these boards show up tomorrow, and I won't need
any.
> > > Could you use some?  I even bought some MilMax type spacers to go from
the
> > > origional socket holes to the adaptor.  I'll have some space on
another
> > > PCB this week, so I might make some more of the correct spacing.
Since
> > > I don't need them, I guess I'll offer the rese to the list.
> > >
> > > - Steven Ciciora
> >
>
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> --
> Steve Ravet
> steve.ravet@arm.com
> ARM,Inc.
> www.arm.com
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