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 f8 P! p$ _+ f$ \; qGenerally speaking ,the root cause of ESD failed is from below.
4 Z5 q  c5 j* J* s/ E" l<i>clamp NMOS's ability.
<ii>clamp NMOS's turn-on rate.
& c) L: w- m$ A0 O. K/ T<iii>Not follow design rule.......................
' q# q) _) q0 |% j( oAs 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 .
+ |$ c1 v% G- iIf adding inverter between RC and clamp NMOS,it will speed up clamp NMOS turned on.
$ B. I! A1 `' ZJust 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
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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
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& t* W9 x, O$ B    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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: z1 V/ v& ~) v4 b4 I謝謝