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.
<i>clamp NMOS's ability.
/ ?- h% y+ O% o3 A. S" N  h5 [<ii>clamp NMOS's turn-on rate.
$ d8 y1 P$ I2 h; o<iii>Not follow design rule.......................
, ^$ C. [% q  ^$ K2 fAs 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 .
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
4 N0 {! a- \. _2 l, ~0 \; O2 ~  M
  `. S( n, i# K3 b一般CDM diode size相較ESD MOS size來說小的多
# p) N; o6 H# u$ j! p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
6 ^- q# R) [. R0 r. Q9 O% ], y

    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
/ x7 C4 l% `/ n- _; |' K& P
謝謝