[SI-LIST] question about using headers in power distribution ?

Hi all,

I am building a PCB that mainly has a xilinx virtex 2000 {XCV2000E}
Now this is a dual voltage chip, i.e :
it requires:
1)  1.8 volts for core voltage 
2)  3.3 volts for I/O's

I guess I will need "two" power planes for the "two" voltages respectively ? 

I am using a PC ATX power supply for this purpose . This supply 
will connect to a PC ATX connector on my board.
On the board I am generating the 1.8 volt using a voltage regulator.

Now my question is:
Should the power pin of the PC ATX connector connect directly to 
the respective power plane by using a VIA  ? 
--------OR-----------
Is it alright if the trace from this power pin first passes through 
a header part before going to the power plane  ( again using a VIA) ?

please do reply with your comments/suggestions ;I'd really appreciate any 
feedback.

thanks a lot

Anand Kulkarni





------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

or to administer your membership from a web page, go to:
http://www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field

List archives are viewable at:     
                http://www.freelists.org/archives/si-list
or at our remote archives:
                http://groups.yahoo.com/group/si-list/messages 
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu

Other related posts: