[802.3_B400G] Proposal for Impedance change for IEEE P802.3dj d2.0

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To: STDS-802-3-B400G@xxxxxxxxxxxxxxxxx

Subject: [802.3_B400G] Proposal for Impedance change for IEEE P802.3dj d2.0

From: Richard Mellitz <000014533bad0b9c-dmarc-request@xxxxxxxxxxxxxxxxx>

Date: Thu, 12 Jun 2025 20:48:52 +0000

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Reply-to: Richard Mellitz <Richard.Mellitz@xxxxxxxxxx>

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Thread-topic: Proposal for Impedance change for IEEE P802.3dj d2.0

Hi All,

Here is a proposal for changing the reference impedance for d2.0 to 92.5 ohms differential and 23.125 ohms common mode since the target impedance for test fixture was change.

The is no change to the COM computation algorithm required. There are several sections that are touched by this.

Comments? Thoughts?

Regards,

Richard Mellitz

Samtec

Richard Mellitz, Signal Integrity (SI) Engineer

Samtec Southeast

Office: 803-908-4411

www.samtec.com

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Attachment: Change of impedance for P802p3dj.pdf
Description: Change of impedance for P802p3dj.pdf