DS92LX1622: Differential Input Range

Hello Charley-san

Our input differential voltage range is 150mV@min, 220mV@typ, 275mV@max.
So, I understand that DS92LX1621 can't properly work.
Could you please let me know any bridge devices to change such a input signal to proper one for DS92LX1621?

Best Regards,
Hirokazu Takahashi

Hello,

Could you clarify the device name? 

The 1622 has a input differential voltage requirement. If you pair the 1621 with 1622, you should not have issue if the cable length is ok.

The 1621 takes in single ended signals so there's no differential input requirement. 

Best Regards,

Charley Cai 

Hello Charley-san

Thanks for your reply.
I'm sorry for your confusing. I want to know about bridge IC for input of DS92LX1622 deserializer.
Out solution will use optical cable with AOC, active optical connectors below.
DS92LX1621 -> AOC(TX)-----> AOC(RX) -> DS92LX1622

The receiver AOC output range is defined as 150mV@min, 220mV@typ, 275mV@max.
Therefore, I guess that any bridge IC will be required to put at the front of DS92LX1622.
Do you have any idea?

Best Regards,
Hirokazu Takahashi

Hi Hirokazu,

This application may be challenging. The DS92LX1621 and DS92LX1622 will have bidirectional channel communication happening. A high speed data from DS92LX1621 to DS92LX1622  and a low speed data from DS92LX1622 is send back to DS92LX1621 and the two signals are superimposed. Does the AOC has the capability to transmit bidirectional signals? 

I think this is the first problem we need to resolve.

Best Regards,

Charley Cai

Hello Charley-san

Thanks for your support.

We won't use back channels, so AOC doesn't have the capability to transmit bidirectional signal.

We found CRC error.

If the back channel will be unavailable, will CRC error be happened?

Can we avoid such an error by setting Tx CRC CHECK ENABLE and  Rx CRC CHECK ENABLE to "0" disable?

Best Regards,

Hirokazu Takahashi