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DIX4192-Q1: input sensitive voltage for Coax

Ryuuichi machida
Guru 11505 points
Part Number: DIX4192-Q1

Hi,

According to datasheet, there is following spec.

* Vth "Differential input sensitivity"

I believe that this spec is for differential, however I would like to know how we can consider in case of Coax.

As you know, this device have internal bias(VDD33/2).

So, in case of coax, input signal become as shown below.

In this case, could you please tell me which idea is correct ?

1. Vth should be 200mV (This means that threshold for low is 1.55V and threshold for high is 1.75V.)

2. Vth should be 400mV(This means that threshold for low is 1.45V and threshold for high is 1.85V.)

If both understanding is not correct, please correct me.

Best Regards,

Machida