On Thu, 21 Apr 2005, ThePicMan wrote:

>
> Hellos,
>
> I have a big FIFO chip covered by dust, that I'd like to finally use.
> The most useful application I'm imagining for it is to finally make
> myself a logic analyzer. This FIFO (Texas Instruments SN74V3690-6PEU)
> is a 3.3V device, but has 5V tolerant inputs. "Great!" I thought.
>
> What I'm asking you is: should I connect the probes (just a header
> cable) directly to the FIFO, or should I use an high speed buffer
> inbetween? Consider that the chip is specced at 166MHz.
>
> Moreover, what is the cheapest way to produce a variable clock
> speed up to 166MHz (and possibly beyond, for other applications)?
> A PLL? Any chip you may suggest me?

Cypress makes what you need. Mouser sells them afair.

Peter
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