關於ESD input and output pin 保護電路設計

wes777

Per my experience ,Diodes + RC-Control , inverter and PowerClamp is better for out pad
Generally speaking ,the root cause of ESD failed is from below.
* t9 H4 K8 h) X: B, s<i>clamp NMOS's ability.
, k6 p& u7 A( [4 i8 q0 M9 M& R/ W<ii>clamp NMOS's turn-on rate.
<iii>Not follow design rule.......................
, l5 ~9 e% _9 f# k2 S4 F" PAs we know ,RC-control is to keep clamp NMOS off when IC is on normal operation.(us)
When sufferred ESD pulse(ns),GGNMOS be turned on by coupling .
$ _7 P( T: w# d/ y$ S) BIf adding inverter between RC and clamp NMOS,it will speed up clamp NMOS turned on.
0 S" O1 @, O6 n, E  ~" JJust for reference !!!

averyer

謝謝大大的分享~更加了解esd的重要性

despair

如果在輸出端加CDM，那輸出端的ESD MOS等於白做
/ s" r: t0 w' E& Z
一般CDM diode size相較ESD MOS size來說小的多
如果同時加上CDM diode，肯定會先死在CDM diode上。

vincentron

谢谢诸位的分享，

chrish2012

回復 20# ihcnqkm
0 g3 ]8 ^$ a. J# g

9 u. Z+ y* e# S) P* s! K* i6 O    很有用啊 ~谢谢各位的提点

tuza2000

学习学习！！！！！！

sxb841018

学习了，谢谢大家啊~~~~~~~~~~~~~~

szona44250

感謝大大的分享，受益無窮
3 d* U6 `0 @' F( z. y  J# t
& d% Z( U" k! |+ W( M* C謝謝