[sdiy] Dumb surface mount question

[Kevin Downs]

> -----Original Message-----
> From: owner-synth-diy at dropmix.xs4all.nl 
> [mailto:owner-synth-diy at dropmix.xs4all.nl] On Behalf Of jbv
> Sent: Sunday, 7 December 2003 3:46 AM
> To: synth-diy at dropmix.xs4all.nl
> Subject: [sdiy] Dumb surface mount question
> 
> 
> Hi all,
> 
> When using surface mount logic ICs, does every cap
> (especially decoupling cap associated to each IC) and
> every resistor have to be surface mount too, or is it
> possible to use traditional caps & res. ?
> 

If you are using high speed logic, greater than a few MHz, you
absolutely need surface mount caps for decoupling. 
The lead inductance of through-hole caps is too large to allow effective
decoupling at these frequencies.

regards,
Kevin