Subject: Re: Multia repair
To: None <port-alpha@NetBSD.ORG>
From: Greg A. Woods <>
List: port-alpha
Date: 06/07/1998 23:53:05
[ On Sun, June 7, 1998 at 22:34:45 (-0400), Joseph Sarkes wrote: ]
> Subject: Re: Multia repair
> Hmmm, upon further visual inspection i find that the board on top
> is a little discolored, and also there is a brown burnt spot on the
> top of the E215 chip... Likely this is my problem also. I don't find
> the chip in the future or newark catalogs so it may be weird enough
> that it isn't a normal stock item (or it could possibly be available
> and just not in the catalog). I will call tomorrow to see if i can 
> get small quantities for a reasonable price and replace it. If it 
> fixes my box I will be all set. Is there a different series of logic
> ics that will replace the F part with lower power consumption? I haven't
> used any of the newer high speed advanced cmos parts, but they seem to be
> in the same ballpark as the F parts with lower power dissipation. I will
> dig out my databooks myself, but if someone already is familiar with this
> and knows for certain that there is/is not a lower power same speed grade 
> part it would be nice.

Earlier <> recommended replacing E215 with a 74ABT623:
> BTW, we also replace E215 with a 74ABT623.  This part buffers the ECC
> bits from DRAM and the ABT part seems to work much better at [high]
> temperature.

In a related thread Ross Harvey reported the following list of alternate
replacement parts for E215:

		TI		SN74ABT623DW
		Philips		74ABT623D
		Pericom		PI74FCT623TS
		Pericom		PI74FCT623ATS
		Pericom		PI74FCT623CTS
		Pericom		PI74FCT623DTS

I'm guessing that not all of the above are the right form factor....

I didn't have too much trouble finding potential suppliers locally just
by searching on-line catalogues on the WWW.  (Now to actually buy a
couple of said semiconductors! ;-)

							Greg A. Woods

+1 416 443-1734      VE3TCP      <>      <robohack!woods>
Planix, Inc. <>; Secrets of the Weird <>