|
|
Per my experience ,Diodes + RC-Control , inverter and PowerClamp is better for out pad/ j0 x; C7 `2 b8 n5 |
Generally speaking ,the root cause of ESD failed is from below.) O# A; d5 V7 j9 t4 E! ]
<i>clamp NMOS's ability.
0 c% _: p, Z8 z) Z( u<ii>clamp NMOS's turn-on rate.
* H2 U& n J7 l7 D) \7 G" }5 }<iii>Not follow design rule.......................+ J! S+ Y$ p+ j# m" D- @" s' a0 _
As we know ,RC-control is to keep clamp NMOS off when IC is on normal operation.(us). l0 [) d( F0 I0 r& m/ O3 W
When sufferred ESD pulse(ns),GGNMOS be turned on by coupling .
- ]3 e6 }) |' B2 PIf adding inverter between RC and clamp NMOS,it will speed up clamp NMOS turned on.
% ^; n8 G3 y; e# X6 {3 U: l% jJust for reference !!! |
|
[複製鏈接]
IP卡
狗仔卡
發表於 2010-5-10 14:38:41
顯身卡