National LMF100 Filter IC ?

[Paul Perry]

At 06:12 PM 26/09/00 GMT, Michael Buchstaller wrote:
>Has anybody used it ? Datashett is at
>http://www.national.com/pf/LM/LMF100.html
>Could it be used to make a VCF by adding
>some simple (555) Clock ?
>
I think (from memory) the cutoff freq is only 1/100
of the clock freq. This might be a problem for 
somethng working across the audio band, because when it is set to
50 Hz cutoff the clock is 5K and would surely be getting into everythng.
I hope someone can tell me I am wrong, though.

paul perry Melbourne Australia