At 11.00 2005.03.04 +1300, you wrote:
>>What would be a reasonable value for a bypass capacitor for use from a IC
>>Vcc and ground? I have been led to understand that 0.1uF ceramic was good
>>and 0.01uF would be acceptable.
>
>The full answer is very long and there are large arguments about the correct answer :-).
>
>The short answer is that for very high frequency digital electronics circuits (say 50 MHz up) then 0.01uF is probably best but for most applications 0.1 uF is best. Either will work OK in most cases. Smaller values (say 0.001 uF are liable to be inferior).
>
>In all cases, keep capacitor lead lengths as short as possible and mount capacitors as near IC power pins as possible. In critical applications use one capacitor per IC.

By the way, there are practical cases when one of the capacitor leads cannot be as short as the other.
In such cases, it is better to make the Vdd one as short as possible, rather than the Vss, or it's the same?

TPM

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