将铜互连扩展到 448G：突破传统限制的创新.pdf

1、Andrew Kim,Jack Wang,Mingchang Wang,Jinhua Chen,Chuck GrantLuxshare-TechExtending Copper Interconnects to 448G:Innovations Overcoming Conventional LimitationsOctober 14,2025Overview Review of where we are at today with 224G Advancing the 3 key elements of the link to support 448G:CPC Front panel IO

2、Twin-ax Related demonstrations at our booth2Luxshare-Tech Total Solution for AI Rack31Cable BP SolutionPower SolutionORV3 Bus-barBus-bar Clip3Thermal Solution4Power Solution123456For Server SolutionSSIO Conn&CableRiser ModuleCool plateFan6For Switch SolutionCHIP2IO/CHIP2BP25BP ConnectorCPC/NPCHSIO C

3、onnDAC/ACC/AECAOC/TransceiverBMQC&CDUManifoldPSU&Power ShelfPower ModuleLuxshare-Tech provides total and end-to-end solution for the Scale Up in the AI rack from 224Gbps Intrepid backplane cable cartridge to Internal SSIO Connector and Cable to Power Bus-bar,Power Shelf,liquid cooling and CDUOCP 202

4、4:212.5G Link Demo with Microsoft and MediaTek Channel loss of 45.5dB ball-to-ball Includes the key elements of the link Plus additional discontinuities from demo connectivity4zBER=10-75 Pre-FEC errors per frameMoving to 448G Demo had 35dB loss channel(45dB ball-to-ball)SI good for 224G but you can

5、see impairments past 53GHz Challenges to increase bandwidth for the next generation are significant So much so,serious/painful options being entertained Changing modulation Abandoning copper Its a challenge,but lets not be rash Copper still has some life in it5CPC Elastomeric Interconnect Enhancing

6、CPC interface bandwidth is hindered by excitation of higher order modes To overcome these,weve broken down the development into 2 phases1)Board and elastomer optimizations2)Koolio connector optimizations6CPC KOOLIO 448G Phase 17Differential Insertion Loss comparison(Measurement)448G Phase 1 Previous