[time-nuts] Simple PLL chips, gone ?

Nick Foster bistromat at hotmail.com
Tue May 4 17:58:19 UTC 2010

If you're thinking about using a CPLD to load registers in a PLL chip, why not just implement the PLL on the CPLD? After all, if you're looking for simpler-is-better, there's not much on a dedicated PLL chip that you can't easily replicate in CPLD with some care and attention paid to layout.

> Date: Tue, 4 May 2010 06:08:56 -0700
> From: jimlux at earthlink.net
> To: time-nuts at febo.com
> Subject: Re: [time-nuts] Simple PLL chips, gone ?
> Luis Cupido wrote:
>> Hi,
>> I'm looking for a relatively simple PLL chip
>> like LMX1501 or similar.
>> I mean, looking for a new design, that is something
>> that is easy to source (known to be in production etc)
>> recent/modern enough to provide a low phase noise.
>> Is for VHF/UHF below 500MHz application and will
>> be for MHz steps (no small steps required).
>> Albeit reasonably low phase noise will be wanted.
>> What seems to be available from An.Dev. and Nat.Sem.
>> are way too unnecessarily complex and I would like
>> it to not have a zilion registers to load via spi.
>> (might use just a small corner of a CPLD to load it).
>> Are the simple ones gone obsolete, or simple no longer in the
>> web pages ???
>> ok... I think you got the idea...
>> I'm looking for the basic think...
>> Any suggestions of what might be usable/available.
>> Thanks.
>> Luis Cupido
>> ct1dmk.
> Or Fujitsu (e.g. MB15E03SL)
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