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Is the speed of the device dependent on IO pads?

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srivatsan

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A thought after reading the many questions in this forum:

Even if the component designed is at requied speed or rate, the final "speed" of the device is also dependent of the pads too. Am I wrong? If my point is correct, then design of IO pads is equally if not more important with actual design of the component....

Srivats
 

about pads

Parasitic capacitance of the pad and the current density etc have to be taken into account.
 

Re: about pads

Yes, you are right. So at high speed communication the full swing logic can't work because the PAD driving is not enough. And rhe LVDS or other small signal output is developed.


Yibin.
 

about pads

Yes, If you want to design IO, you must consider the package and PCB. especially in high speed IO design, you must consider impedance match.
 

Re: about pads

yibinhsieh said:
And rhe LVDS or other small signal output is developed.


Yibin.
Click to expand...
What LVDS stand for?
 

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