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
8 u. U3 c. K$ }1 e" [. ~! e1 bGenerally speaking ,the root cause of ESD failed is from below.
<i>clamp NMOS's ability.
7 U1 x" \/ `  \<ii>clamp NMOS's turn-on rate.
<iii>Not follow design rule.......................
3 \5 P+ o3 \1 e; JAs we know ,RC-control is to keep clamp NMOS off when IC is on normal operation.(us)
; B6 _4 ^- B/ XWhen 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.
) w7 v1 R6 T! l* x  Q& Y: K: K+ xJust 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
% G/ i& h* ~, f" a+ c! [
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
2 r3 C( S% A3 ~6 q! k3 u

: x! n# l# r. p8 B1 A    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
# \/ A/ {( M: J. h9 A; U8 t
謝謝