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VHF Digital Divider

Please forgive my incipient senility; I know I posted this question a year or so ago and can't find the thread anywhere, either in my own archive or Google's archive.

Back when I was doing a fair amount of frequency synthesizer work I used the Motorola MC12015-16-17 for a lot of my prescaling tasks. Those devices are no longer in production. Right now I don't need dual modulus (pulse swallow) but could certainly use a dualie and just tie modulus control hard.

Does anybody still make a VHF/UHF prescaler these days? Through-hole preferred but SMT acceptable.

Jim

Reply to
RST Engineering (jw)
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NEC make a bunch, good for 1-3GHz, but IIRC they don't work below a fairly high minimum frequency (IIRC, ~1GHz for some of the 3GHz units). I doubt there's anything from them that isn't SMT, and fine pitch at that.

Best regards, Spehro Pefhany

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Reply to
Spehro Pefhany

That stuff went to ON semi, which still advertises some 1.1GHz prescalers. Dunno if they'd work at lower frequencies.

For VHF you could almost use a CPLD, but you'd have to do a lot of signal conditioning to get a clean clock in.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Posting from Google?  See http://cfaj.freeshell.org/google/

"Applied Control Theory for Embedded Systems" came out in April.
See details at http://www.wescottdesign.com/actfes/actfes.html
Reply to
Tim Wescott

NEC has a bunch. See CEL.com.

John

Reply to
John Larkin

Plessey Semiconductor used to make a wide range, including dual modulus. Now at:

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Chris

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Greenfield Designs Ltd
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Embedded Systems & Electronics: Research Design Development
Oxford. England. (44) 1865 750 681
Reply to
Chris Quayle

Hello Chris,

And they made excellent mixers but unfortunately it seems they went under. When the last order bell was rung I quickly bought a stash of SL6440.

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Regards, Joerg

http://www.analogconsultants.com
Reply to
Joerg

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