|
|
Per my experience ,Diodes + RC-Control , inverter and PowerClamp is better for out pad
) \ v. p6 ^% @: o& b& M2 ?) rGenerally speaking ,the root cause of ESD failed is from below.( h, a" S- Y; T7 }2 f# d8 [, e8 O
<i>clamp NMOS's ability./ L0 i! G/ V- v, k2 `
<ii>clamp NMOS's turn-on rate.
6 J o5 u. N3 A6 J. f0 [* d<iii>Not follow design rule.......................) {) m3 b4 N4 h% o0 Z& q7 w5 ^
As we know ,RC-control is to keep clamp NMOS off when IC is on normal operation.(us)9 N" ^' P0 o! z# w! v6 |: @
When sufferred ESD pulse(ns),GGNMOS be turned on by coupling .
$ r. y% T) n0 v* b+ ?3 g$ GIf adding inverter between RC and clamp NMOS,it will speed up clamp NMOS turned on.1 Y( K9 k% Y5 r) `
Just for reference !!! |
|
[複製鏈接]
IP卡
狗仔卡
發表於 2010-5-10 14:38:41
顯身卡