[hpsdr] [OZY] Initial OZY Schematic Posted For Review and Comments - May 10, 2006

[Philip Covington]

On 5/11/06, Lyle Johnson <kk7p at wavecable.com> wrote:
> > Anyone have suggestions on a 128Kx8 SRAM?  I was looking at using the
> > ISSI 63LV1024  12 ns which Mouser carries.  Unfortunately the only
> > package that they stock is the SOJ type so I'd probably put an
> > optional socket on the OZY for it (if there is room).  Cypress has
> > some SRAM in the 1Mb size but it looks like it is pretty scarce.
>
> I'd got for the much slower RAMs, 55 to 100 nsec range.  They draw a
> *lot* less power.  Digikey stocks the CY62128 (128Kx8) for $6.20 @qty 1,
> and the CY62148 (512Kx8) for only 70 cents more.
>
> 73,
>
> Lyle KK7P
>

Anyone have any objection to going with the slower 70 ns SRAM?  If we
used the 512Kx8 I need to come up with some extra IO pins somewhere...

73 de Phil N8VB

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