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From: Winfield Hill
Subject: Re: clock divider
Date: 22 Oct 2002 15:29:29 -0700
Organization: Rowland Institute
X-Newsreader: Direct Read News 2.98
Bill Sloman wrote...
> "Jamie Morken" wrote ...
>> I am building a circuit that requires a 120MHz clock and a 24MHz clock and
>> they also need to be synchronous. Is there a "divide by 5" clock divider
>> chip I could use to get the synchronous 24MHz clock from the 120Mhz clock?
> You could build a 120MHz to 24MHz synchronous divider for a TTL/CMOS system
> with one of the faster programmable logic devices - I haven't looked at them
> for years, so I don't know what would be the flavour of the month.
I like the Xilinx parts. For example the XC9500 series, with the XC9572XL
working up to 178MHz and the newer XC9572XV up to 200MHz. The 'XL types
are powered from 2.5 or 3.3V supplies and the 'XV from 1.8 or 2.5V, but
both types accept up to 5V logic inputs. Free programming software.
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