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
9 g- k3 D& x3 Y, W6 L2 \* D6 CGenerally speaking ,the root cause of ESD failed is from below.
" A. y: B2 R  U# A- [<i>clamp NMOS's ability.
1 s7 X/ K  O- F! T) d0 E<ii>clamp NMOS's turn-on rate.
<iii>Not follow design rule.......................
As we know ,RC-control is to keep clamp NMOS off when IC is on normal operation.(us)
6 g  G, Q- w: Q. T' Y, M! uWhen sufferred ESD pulse(ns),GGNMOS be turned on by coupling .
If adding inverter between RC and clamp NMOS,it will speed up clamp NMOS turned on.
( o2 ?* M. Q( ^( `Just 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
7 v4 s3 E8 w6 m0 G6 n
3 X6 O. N/ S9 l: Q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


- O1 G% V+ A" H7 c- @    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
% G, t  B) ]- q" P; e( [
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