I would be more concerned about your edges (if required) for 
          transition setup, or triggering.  
          
          What kind of transition times are you dealing with?
          


______________________________ Reply Separator _________________________________
Subject: Delay with feedthrus
Author:  [log in to unmask] at internet-mail
Date:    5/20/96 1:55 PM


          
Dear techies,
          
I need some help in calculating delays due to feedthrus.  I am not sure 
what's involved in the equation but here's what I have:
          
FR-4 0.062 (50 ohm impedence)
FHS is 0.026, Pad 0.040
MCLK frequency is 60MHz (Testing a 7 ns SRAM) 
Solder mask SR-1000
Tin-nickle (1oz Copper) plating
Solder type 96/4
          
SHould I worry about delay's at that frequency??  Any references would be 
appreciated.  thanks in advance.
          
          
Please feel free to contact me if you have any questions.
          
          
          
Regards,
          
Bilal Khalaf
Applications Engineer
email: [log in to unmask]
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