112 Gbps PAM4 Samtec Flyover™ Live Demonstration
112 Gbps Samtec Flyover™ Demo
Samtec’s Ralph Page walks us through a live demonstration of a Samtec Flyover™ system which enables 112 Gbps PAM4 performance.
The Credo CDR generates two ports of 31-bit PRBS data at 112 Gbps PAM4 data rates. The signal travels from the Credo Pelican II SERDES test board through precision RF cable assemblies, to a Samtec Flyover™ QSFP-DD SI Evaluation Kit. This cable assembly, approximately 12” (30.5 cm) long, uses Samtec 34 AWG Eye Speed® Ultra-Low Skew Twinax cable.
End 2 of the cable assembly is a 0.635 mm AcceleRate® Slim Body Cable Assembly, back through precision RF cable assemblies, to another Credo CDR running at 112 Gbps PAM 4 data rates.
Ralph also quickly reviews of the performance of the system. As the GUI shows, it ran 31-bit PRBS data at 112 Gbps PAM4 data rates with a BER of 4e-7 with evaluation products. Production grade interconnect should improve BER to 1e-8.
Eye heights were over 90mV. This clearly demonstrates that Samtec’s QSFP-DD is easily adequate for 112 Gbps PAM 4 speeds.
Samtec Flyover QSFP-DD
Samtec was the first interconnect company to bring the QSFP Flyover product line to market. Samtec is excited to announce another first in the Flyover realm: Samtec’s FQSFP-DD is the first product to take the Samtec Flyover™ architecture concept to the QSFP-DD form factor.
The QSFP-DD form factor focuses on a next generation high-density, high-speed pluggable backwards compatible module form factor. The FQSFP-DD Samtec Flyover™ product meets this challenge with greater performance margin compared to the QSFP-DD connector-to-PCB approach. As advanced 50+ Gbps per channel ASIC and FPGA solutions hit the market, the next-generation Samtec Flyover approach overcomes the limitations of signal loss on a PCB trace and continues to become more relevant. Click here for more information on Samtec Flyover QSFP-DD
The Samtec Flyover QSFP system provides improved signal integrity and architectural flexibility by removing critical high-speed signals from lossy PCB materials and transferring directly to the panel via ultra-low skew twinax cable. Double density Samtec Flyover increases throughput over QSFP by adding a second row of contacts enabling support for an eight-lane electrical interface. This is the FQSFP -DD Series.
Samtec AcceleRate Ultra-High Density System
Samtec’s AcceleRate® cable assembly is the slimmest in the industry with a 7.6 mm body width ideal for closer proximity to the IC. The high-density 2-row design features 8 and 16 pair configurations on a 0.635 mm pitch for up to 92 pairs per square inch.
Rated to 56 Gbps PAM4, this assembly supports Samtec Flyover™ technology via 34 AWG 100 Ω ultra-low skew twinax Eye Speed® cable. This proprietary co-extruded cable supports next-generation performance with extended reach and system flexibility.
Metal latches on both End 1 and End 2 of the cable connectors are standard, as well as standard and reversed wiring options. The mating PCB level connector is the ARF6 series. For more information go to samtec.com/accelerate.
