|
|
Per my experience ,Diodes + RC-Control , inverter and PowerClamp is better for out pad6 w; o3 b" D! v: r1 n$ I
Generally speaking ,the root cause of ESD failed is from below.
) q k; n" K- \4 Q5 ~: ?<i>clamp NMOS's ability.
# {7 [$ f/ a/ T" I/ Q<ii>clamp NMOS's turn-on rate.7 \+ a( \% l. y, Z- K$ ~
<iii>Not follow design rule.......................6 N4 g4 s/ v: a6 o
As we know ,RC-control is to keep clamp NMOS off when IC is on normal operation.(us)* k( U; T# U7 L# B! B, r
When sufferred ESD pulse(ns),GGNMOS be turned on by coupling .
( n0 v' z' B6 c4 N8 k& |8 M) RIf adding inverter between RC and clamp NMOS,it will speed up clamp NMOS turned on.
+ z! b. l* s3 X% rJust for reference !!! |
|
[複製鏈接]
IP卡
狗仔卡
發表於 2010-5-10 14:38:41
顯身卡