DesignCon is part of the Informa Markets Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them. Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Early Bird Registration Now Open till November 30th. Save Up to $300 Today!

DesignCon 2019 Presentation Viewer

Purchase procecdings

Welcome to the DesignCon Presentation Store. Here you can view and download conference and/or show floor theater presentations before, during, and after the event. If you’re looking for a presentation from a specific session that you’re unable to find here, note that it’s likely because the presenter has not provided permission for external use or has not yet shared their presentation with us. Please check back after the event for a more complete catalogue of available presentations.

If you’d like to do a bulk download of all conference presentations or technical papers at once, please click here for conference presentations or click here for full technical papers. For sessions not included in the main conference, click here for Chiphead Theater presentations or click here for sponsored session presentations.

Interconnect Design Practice Beyond 56-Gbps PAM4 System

Greg Fu (SI Engineer, Cisco)

Sherman Chen (Senior SI engineer, Cisco)

Stephen Scearce (Manager, Hardware Engineer, Cisco)

Location: Ballroom E

Date: Wednesday, January 30

Time: 11:00am - 11:45am

Track: 08. Optimizing High-Speed Serial Design

Session Type: Technical Session

Vault Recording: TBD

Audience Level: All

When SERDES rate switched to higher rate like 56Gbps/112Gbps PAM4, the ignored second effects of the interconnect actually play an important role in the system performance. The work present interconnect design practice from both component and system level. Some effects are investigated in details: Skew impact on XT, skew compensation strategy on XT, asymmetric fanout pattern, XT through footprint antipad, impact of different impedance system on ILD. A set of design guide are summarized and have been implemented into the present system.


skew will not only make IL worse, but also XT.
skew compensation strategy need to be careful on XT.
Make differential pair really differential is very important.
Be careful for XT through antipad.
More practical evaluation metrics of ILD will be helpful.

Intended Audience

High speed designer

Presentation Files