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Things to be taken care while doing IO layouts

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suresh_vlsi

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io layouts

Guys

I have few points which can be helpfull while doing IO layouts


* Any mos devices which is directly connected to power must have a dummy diode connected in parallel.

* All pre driver output signals has to be shielded

* Driver part has to be very close to the pad

Any other suggestions ?? you are most welcome to share it
 

hello,suresh_vlsi
can you explain why,especilly "All pre driver output signals has to be shielded "
best regards
suresh_vlsi said:
Guys

I have few points which can be helpfull while doing IO layouts


* Any mos devices which is directly connected to power must have a dummy diode connected in parallel.

* All pre driver output signals has to be shielded

* Driver part has to be very close to the pad

Any other suggestions ?? you are most welcome to share it
Click to expand...
 

The predriver part is very critical in io design as the output of the same will be input of the driver ckt ... any variation in the predriver output will affect the whole functionality of an io .... coz the slew rate is mainly controlled by the predriver ....
 

suresh_vlsi said:
Guys

I have few points which can be helpfull while doing IO layouts


* Any mos devices which is directly connected to power must have a dummy diode connected in parallel.

* All pre driver output signals has to be shielded

* Driver part has to be very close to the pad

Any other suggestions ?? you are most welcome to share it
Click to expand...

Why is 'dummy diode connected in parallel' used? is it ESD?
I think if it is diode connected MOS in parallel, it will consume current.
Isn't it?
 

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