DS125BR820: P2P replace for DS125BR800A

Hi Jeff,

When sharing schematics in the future, would it be possible to share searchable PDFs?  This is really helpful for efficient schematic review.

In general, the DS125BR820 should perform similarly to the DS125BR800A if the DS125BR800A is set to transparent mode without de-emphasis.  Something I noticed is that your DS125BR800A is set to transparent mode with de-emphasis, but appears to implement 0 dB of DEM with the current pin settings.  Because of this, I believe the DS125BR800 would still be suitable in this system.  I would recommend considering IBIS AMI simulations to verify the DS125BR820 would provide adequate equalization.

Beyond this, you may need to re-evaluate which resistors you populate on the pins that differ between the DS125BR820 and DS125BR800A.

Thanks,

Drew

Hi Jeff,

Thanks for sharing the PDF.  At this point, my recommendation would be that the customer evaluates which resistors need to be populated for the DS125BR820 design.  After going through this, I would be happy to review an updated schematic.

Thanks,

Drew