[sdiy] 4046 differences?

[Kevin Lightner]

>I just looked at a table comparing 39
>different varieties of 4046, and the Motorola
>MM74HC4046 variants have an output transition
>time three times faster than everything else.
>
>I remember somethng that was made (surface mount)
>and the 4046 mattered, but I can't remember why.
>
>paul perry (Frostwave analog fx) Melbourne Australia


Thanks to all that replied.
I wouldn't mind this chart above either :)

Here's something interesting that I found on someone's website via Google:

>>Take care about which 4046 chips you use for U1 and U3. The 
>>Phillips 74HCT4046 chips (formerly sold by Radio Shack) are fine. 
>>So are CD74HC4046 chips made by Harris or T.I. Do not use chips 
>>made by Fairchild and do not use CD4046 chips; both have a 
>>different design and will not work in this circuit.


Keep in mind that I'm speaking about the same chips, but from 
different manufacturers.
MC14046's from Motorola seem to be different than CD4046's from 
Fairchild, for example.

-- 
Regards,
Kevin Lightner

Myself: http://www.synthfool.com
Service and sales: http://www.moogmusic.com/service.php
Sales: http://www.cluboftheknobs.com
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