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Digital/analog ic switch to choose between capacitors

Posted on 2010-11-22
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Last Modified: 2012-05-10
I have a circuit that has several different capacitors in it that I am currently using SP3T switch to switch between the capacitors.  They are in a 555 timer circuit and the various capacitors change the output according to which capacitor is connected.  I have 3 non-polarized on a switch and 3 polarized on another switch.  What I want to do is eliminate the manual switches and replace them with an ic switch so I can choose which cap is connected to the circuit using a micro.  I'm not sure what kind of ic would be appropriate for this type of application.  I found this ic TS5A3357 I am thinking about getting and trying.  I would like to know if anyone has a suggestion or can tell me if the ic will work.  I'm sure I could use reed relays for this, but I would rather use an ic switch if possible.  I attached an example circuit.  Thanks for any help.  
excirc.bmp
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Question by:deer22
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d-glitch earned 500 total points
ID: 34191042
The TS5A3357 is fine if you are using the 555 with a 5V power supply.

     http://focus.ti.com/lit/ds/symlink/ts5a3357.pdf


You could also use a CD4016 in you want to run the 555 at higher voltages (up to 15V).
With the 4016, you get four switches in a 16-pin DIP.
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by:d-glitch
ID: 34191067
Data sheet for the 4016:

     http://www.fairchildsemi.com/ds/CD/CD4016BC.pdf
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by:deer22
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Thanks for the quick response.  i was thinking something like the 4066 or 4016 would also work.
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