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From: "Bill Sloman"
Subject: Re: clock divider
Date: Wed, 23 Oct 2002 00:04:46 +0200
Organization: Planet Internet
NNTP-Posting-Date: 22 Oct 2002 22:04:44 GMT
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
"Jamie Morken" wrote in message
> 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?
Depends whether you are working with TTL/CMOS or ECL. 120MHz is jsut a bit
too fast for integrated circuit synchronous counters in TTL, but no trouble
at all in most flavours of ECL.
All the synchronous counters I known can be programed to divide by five.
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.
Bill Sloman, Nijmegen
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