[time-nuts] 74HCT9046A Max. Operating Frequency

Magnus Danielson magnus at rubidium.dyndns.org
Wed Apr 30 18:44:15 EDT 2014



On 05/01/2014 12:10 AM, Daniel Mendes wrote:
> Em 30/04/2014 13:38, Magnus Danielson escreveu:
>> Alex,
>>
>> You should direct your comments to Samuel that is doing a design.
>
> He replied to me because I also asked a question about the 74HCT9046A.

Ah, yes. Memory is good when you have it.

>> I know very well about keeping the comparator frequency high, and that
>> the 9045 may not be the ideal comparator.
>
> What I understood about this thread is that the comparators have maximum
> frequencies also, and that they are lower than the maximum VCO
> frequency... maybe that was my mistake. Must return to the drawing board.

A few flip-flops to bring the frequency down by a factor of 2 or 4 
should do it.

Cheers,
Magnus



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