Capacitors between CTOP and CBOT

[kzk6700]

Looking at the data sheet "11.6.1 Power Delivery Solutions" and "Figure 11-11. Power Delivery Solutions" of the Ethernet controller "WGI211AT", a 0.039uF capacitor is connected.
Is it okay to change this to another capacitance?
If it's okay to change it, what is the allowable capacitance?

[Caguicla_Intel]

Hello kzk6700,

Thank you for posting in Intel Ethernet Communities. 

Before we proceed with your query, can you please share if you are designing or customizing your own board? If yes, we may need to move this thread to different topic to further assist you. If no, please provide the model of the motherboard used, intended setup and why do you require this information. 

Looking forward to your response.

We will follow up after 3 business days in case we don't hear from you. 

Best regards,

Crisselle C

Intel® Customer Support

[kzk6700]

Thank you for your reply.
I will attach my design.
Generally, 39nF capacitors are not easily available and are disadvantageous in terms of procurement. Therefore, we are thinking of replacing it with a capacitor with a capacitance (47nF, etc.) that is easier to obtain.

[Caguicla_Intel]

Hello kzk6700,

Thank you for the reply.

Since your query involves customization, please be informed this will be best answered by our Embedded Connectivity Support team. We will help you to move this post to the designated team for further assistance. Please feel free to contact us if you need assistance from Ethernet support team.

May you have an amazing day!

Best regards,

Crisselle C

Intel® Customer Support

[kzk6700]

Thank you for your support.
We look forward to working with you in the future.

[CarlosAM_INTEL]

Hello, @kzk6700:

Thank you for contacting Intel Embedded Community.

The specifications related to the proper functionality of the Intel devices can be found in their documentation.

Due to this fact, you should test and validate any conditions out of the documented information.  

Best regards,

@CarlosAM_INTEL.

[kzk6700]

Thank you for your reply.
I couldn't find any mention of this in the "WGI211AT" manual.
If you know of any documentation that mentions this, would you please let me know?

[CarlosAM_INTEL]

Hello, @kzk6700:

Thanks for your reply.

The experimentation and experience performed by Intel specialized staff determine the conditions stated in their documentation.  This information assures the proper functionality of their devices.

You can confirm this fact by following all the documented suggestions and test them.

The scenarios or information not included in the documentation should be verified and confirmed by the customer that wants to implement them because they are out of the Intel investigation. 

Best regards,

@CarlosAM_INTEL.

[kzk6700 · Accepted solution]

Thanks for the reply.
The lack of alternatives in the documentation basically means that no other method than recommended is guaranteed.
We know.
Thank you for your support.

[CarlosAM_INTEL]

Hello, @kzk6700:

Thanks for your reply.

Intel gives the recommended conditions for the proper functioning of their devices in their documentation.

You have the chance to implement some electronic configurations create by yourself that would be inside of the suggested conditions, or try with specifications out of the documented ones that should be tested and validated on your own.

Intel and the rest of the technology companies give documentation with specifications that assure the functionality of their devices. You should understand that the documentation would be bigger than the available, and it could induct to mistakes if other conditions are included in them.

Best regards,

@CarlosAM_INTEL.