Data Line ESD Protection, how it works

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bug13

Joined Feb 13, 2012
2,002


I come across this while I am studying signal diode arrays, can someone explain it to me, how does it work please, thanks! :)
 

hexreader

Joined Apr 16, 2011
581
Assuming typical diode forward voltage drop of 0.6 volts...

Any voltage higher than Vcc+0.6 volts (e.g. 2000 volts electrostatic charge) will flow through the top diode to the power supply, before any damage can be done to the inverter circuit, hopefully.

Same for any voltage less than GND-0.6 volts, where the other diode will conduct.

Diode only allows current flow in one direction, so in normal use the diodes will not conduct.
 
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