Hi E2E Team,
I am planning to use ESDS304 in my design to protect the Ethernet interface (1000BASE-T) from ESD and EFT. As per my understanding the 1000BASE-T signals are encoded using PAM5 encoding scheme in which voltage levels can be between +1V to -1V. Please refer to below image-
When signal voltage level goes to negative, the ESD diode will be in forward bias. As per datasheet Vf is 0.8V (typical). So when -1V will appear on the signal line the ESD diode will reduce the voltage to -0.8V from -1V.
My question here is what will be the impact of the above mentioned scenario in the normal operation of the interface? Would Ethernet interface work normally in long run on we can face issues due reduced voltage levels?
Aditya Kumar Singh