[SI-LIST] ESD protectioin at a Digital Input
- From: "Arun Kumar P N" <arun@xxxxxxxxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Wed, 9 Dec 2009 16:16:23 +0530
Hi All,
I'm checking for ESD protection at a Digital Input pin.
A Switch is connected to a Schmitt Buffer. The Schmitt buffer is ESD rated
for 1000V HBM
I'm planning to put an external suppressor for IEC levels, on the PCB
My understanding is the clamping voltage should be less than the max
withstand capability of the pin to be protected.
Since it has internal protection of 1000V, does that mean I can put a
suppressor with a clamping voltage of say 200V?
Or should I use an ESD suppressor with a clamping voltage well below 10V?
Regards
Kumar
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