Samtec Si-Fly HD & 224G Backplane Interconnect Systems — 224 Gbps PAM4 Cable Backplane Portfolio

Specifications

Overview

Samtec's high-speed backplane family spans the full range of AI-rack interconnect requirements, from the 224 Gbps PAM4 Si-Fly HD cable backplane system through NovaRay micro rugged, ExaMAX and XCede HD. For GPU and switch platforms pushing past 51.2T of switching capacity, the cable backplane is where signal integrity budget is won or lost.

Si-Fly HD combines Eye Speed hyper low skew twinax cable at 1.75 ps/m max intra-pair skew with an open-rack-unit form factor carrying up to 2,048 differential pairs - 7.2 Tbps of aggregate bandwidth per 64-pair connection. NovaRay extends micro rugged backplane performance to 128 Gbps PAM4 with 128 differential pairs per connector on a 0.90 mm footprint, and is PCIe 7.0 capable.

ExaMAX remains the workhorse high-density backplane platform: 112 Gbps PAM4 over Flyover cable, 64 Gbps PAM4 board-to-board on 2.00 mm column pitch, two reliable points of contact under angled mating, and the lowest mating force available at 0.36 N max per contact. The family is PCIe 6.0 / CXL 3.2 capable and meets Telcordia GR-1217 CORE.

Key Benefits

Purpose-built for AI rack scale: 224 Gbps PAM4 density that keeps 102.4T switch and GPU rack interconnect inside a single open rack unit. Signal integrity margin: 1.75 ps/m max intra-pair skew twinax preserves channel margin at 224G. Design flexibility: co-packaged, near-chip and cabled backplane options from the same connector family, with power and guide modules integrated.

Applications

AI accelerator racks and GPU trays, 102.4T and 51.2T switch chassis, co-packaged and near-chip copper connectivity, cable backplane systems, high-density storage backplanes, HPC and hyperscale data center interconnects.

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