Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!cwjcc!hal!nic.MR.NET!xanth!mcnc!unccvax!dya
From: dya@unccvax.UUCP (York David Anthony @ WKTD, Wilmington, NC)
Newsgroups: sci.electronics
Subject: Re: 68000 Chips
Message-ID: <1273@unccvax.UUCP>
Date: 7 Dec 88 14:42:46 GMT
References: <2196@lll-lcc.llnl.gov>
Organization: Univ. of NC at Charlotte, Charlotte, NC
Lines: 33

In article <2196@lll-lcc.llnl.gov>, rzh@lll-lcc.llnl.gov (Roger Hanscom) writes:
> 
> In item <12169@cup.portal.com> Jeff_A_Scott@cup.portal.com
> writes:
> 
> >I'm looking for a low-priced source of Motorola 68020 processors.
> >I just want one (and a 68881 co-processor) and I've looked in all the
> >common places (back pages of Byte, etc).  Since this is a ~$300 purchase
> >the best price is important.  Anyone know a cheap place?

	If you are on good terms with your local Schweber or Hamilton-Avnet
rep (or other Motorola distributor) they should be able to secure a 12.0 
mHz processor in the $80-$120 range.  They are jellybean parts now.  (I
think I paid $135 for MC68020RC12 last summer, which is still awaiting the
breadboard!).

	For the coprocessor, you are on your own.
	Try and get prime parts, anyway.  I can't believe that most of the
junk in the back of consumer fishwrappers were obtained from legitimate
sources.  (We've bought some, er, grey-market RAM chips from ads in
magazines (they take MC &Visa, hey, what can I say) and while they meet
the speed spec, they usually do not meet the speed at power dissipation
spec.)
	
	68008's from a **well known** mail order place (Mostek brand) have
an off-spec failure of about 1 part in 25.  DUARTS (MC68681) were even
**worse**.

	If at all possible, get prime parts.  Saving money on off-spec
devices, fallouts, cull-outs, call 'em what you will, is false economy.

York David ANthony
WKTD Wilmington, NC