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4066 IC - Quad Analog Switch - WARNING
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4066 IC - Quad Analog Switch - WARNING

by stinkleton on Tue Jul 09, 2019 11:04 am

After much hair pulling, I've realized all the 4066 chips I recently bought have specs that are no good.

The BOM should be updated. It lists merely "4066 analog switch - Has "4066" somewhere on the body"

No. Way too vague. All 4066's are not the same.

They may be indicated as Quad Analog Switch IC's, but they have different operating voltage ratings. The x0x needs one that operates correctly at 12v.

CD4066BE - good (rated for 3v thru 18v)
HCF4066 - good (but obsolete) (rated for 3v thru 20v)
74HC4066N - BAD (rated for 2v thru 6v)

stinkleton
 
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Joined: Sat Jun 29, 2019 10:22 am

Re: 4066 IC - Quad Analog Switch - WARNING

by stinkleton on Tue Jul 09, 2019 11:07 am

PS the bad 74HC4066N resulted in filter warble, and weird offset/envelope issues when adusting the Decay pot.

stinkleton
 
Posts: 5
Joined: Sat Jun 29, 2019 10:22 am

Please be positive and constructive with your questions and comments.