Mario,
     It could be as low as double the voltage that it is bypassing but=20
the 50V ones are easier to find and very common.
Thanks,
rich!

On 12/2/2017 11:11 PM, Electron wrote:
> Thank you for all replies. I would like to address one in particular:
>
> Just one question, why 50V? Just because it's very difficult to find 100n=
F
> ceramic capacitors of lower voltage, or 50V specification is truly needed
> (but why? it's a 3.3V circuit after all).
>
> Thank you.
>
> Have a nice sunday,
> Mario
>
>
> At 00:15 2017-12-03, Richard Pope wrote:
>> Mario,
>>      Yes! I won't go in to the reasons why. I bypass the Oscillator
>> and/or oscillators and all of the digital ICs. Linear VRs are also
>> bypassed but look at the datasheet to get the proper values. I mostly
>> use 0.1uF 50V Ceramics. I have at times used 0.01uF 50V Ceramics.
>> Thanks,
>> rich!
>>
>> On 12/2/2017 12:18 PM, Electron wrote:
>>> Hello,
>>> it may seem a banal question, but as it's the first time I use an exter=
nal
>>> oscillator (with integrated crystal), I am not sure. The datasheet make=
s no
>>> mention whatsoever to the need to use a bypass capacitor in the power l=
ine:
>>>
>>> https://global.kyocera.com/prdct/electro/product/pdf/clock_k_e.pdf
>>>
>>> But is this truly the case?
>>>
>>> Should I put a (100nF?) bypass capacitor anyway in your opinion?
>>>
>>> Space on the board may be used for something else otherwise, so I don't
>>> want to put useless components. But then again who does.
>>>
>>> Also, I guess there's no advantage in grounding the metalcase on this
>>> integrated oscillator, like I use to do with Xtals. Maybe it's already
>>> grounded but I haven't received it yet.. I ask in case it's not.
>>>
>>> Thank you.
>>>
>>> Kind regards,
>>> Mario
>>>
>>
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