At 06:15 PM 12/16/2005 -0500, you wrote:
>I am using the MC33887 in a motor driver circuit, it calls
>for up to a 30 pf cap.  I have a bunch of ceramic caps rated
>from 20 pf to 33 pf that I use to use for the crystal on a
>PIC circuit. I will be driving the MC33887 with a 7.4V Lion
>pack, fully charged it will be about 8.4V.
>Now the question is I have no idea what the voltage rating
>on these ceramic caps is ?  They are ceramic and have a
>diameter of 3.75mm. Anybody have a guess ? Anyway to tell ?
>They have no markings except the 20 or 33 on them.
>
>Thanks,
>Kevin

Almost certainly okay. Usually small low-capacitance NPO disk caps like
that are rated for at least 50V or 100V. I wouldn't hesitate for a moment
unless you think there are spikes that could go much higher than 30V.

>Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
->> Inexpensive test equipment & parts http://search.ebay.com/_W0QQsassZspeff


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