SN65LVCP114 Mode Change

Dear TI Team.

I have one more question for SN65LVCP114

On-board capacitors provide AC coupling of high-speed transmit and receive signals and 100nF is adopted.

Is there any issue when I change this 100nF  to 10nF?

Hi Avraka,

When you say that you want to switch from GPIO to I2C in the state of operation are you referring to changing the communication mode while the device is in operation?

Changing the AC coupling from 100nF to 10nF should not be an issue. Things to consider when making changes like this are your frequency of operation and maximum run length of your bit sequence:

     Tau = (50ohms)(100nF) = 5uS

     Tau = (50ohms)(10nF) = 500uS

So long runs of ones and zeros could adversely effect your system with the timing change. 

Regards,

Mike

Thank fo r your quick reply..

When you say that you want to switch from GPIO to I2C in the state of operation are you referring to changing the communication mode while the device is in operation?

=> Yes. That is right.

Changing the AC coupling from 100nF to 10nF should not be an issue.

=> My customer will use SN65LVCP114 for 10G-KR. So I will recommend 100nF is better than 10nF.

Thanks a lot..

Hi Avraka,

There should be no issues with switching from GPIO to I2C mode during normal operation. Please refer to the pin description table in the data sheet though as some pins may share functionality across GPIO and I2C modes.

Regards,

Mike