The 28 Gbps Product Demonstrator is an active system that showcases a variety of Samtec interconnect products at 28 Gbps and beyond.
The Demonstrator was up and running at SC17, and Anthony Fellbaum was there also, where he walked us through the demo.
Real World 28 Gbps
This demonstration is different from those of other connector suppliers. Many of those demonstrations preferentially showcase one or two differential pairs in a channel through one connector or cable assembly.
The 28 Gbps Product Demonstrator is a small version of a real system. It uses active retiming devices at 28 Gbps, for short reach and medium reach channels, and it incorporates most of Samtec’s 28 Gbps products.
The demonstrator concurrently generates 80 PRBS31 signals at 28 Gbps. Each signal passes through one or more Samtec connectors, and we measure bit errors, signal amplitude, and eye patterns, all in real-time.
This is a fully packaged system that uses modern, real-world signal integrity design practices, automated design processes, and shows multiple IEEE 100 G channels passing through Samtec mezzanine and Flyover™ products.
The embedded code is written in C, with the same code used in all seven boards, regardless of type. This handles all of the on-board components, including memory and the MoSys MHS222 and MHS110 retimers.
The system fully exercises a backplane with all channels operating simultaneously with worst-case random patterns on the backplane.
Cost Effective Materials
The backplane is manufactured with Isola I-Tera®, the line cards are fabricated with Isola I-Speed®. These designs are scalable from FR4 class materials all the way through higher performance materials. As good system designers, we are targeting the lowest cost material that will get the job done.
Moving forward, we are looking to add 56 Gbps PAM4 capabilities, as well as 112 Gbps PAM4 with Flyover products.
Products in the 28 Gbps Demonstrator
- SEARAY™ High Density Array
- SEARAY .8mm High Density Array
- LP Array™ Low Profile Array
- ExaMAX® High-Speed Backplane Connector
- FireFly™ Micro Flyover™ System
- FQSFP Flyover QSFP28 Cable System
- Z-Ray® Ultra-Low Profile Array