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
, O1 R5 m3 C, N. I& nGenerally speaking ,the root cause of ESD failed is from below.
0 D/ ^0 C4 Z* y0 n( a<i>clamp NMOS's ability.
<ii>clamp NMOS's turn-on rate.
! A& ^' i6 p0 u4 J7 N" h<iii>Not follow design rule.......................
% S+ P/ U6 j- ]3 y$ sAs we know ,RC-control is to keep clamp NMOS off when IC is on normal operation.(us)
/ L. J! c7 L& J- {3 M; I8 s: mWhen 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.
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

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
5 H& y$ u0 y8 C, B' Z
9 {& g3 ?- s) |, Q$ f4 I4 D: }
    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
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謝謝