DesignCon 2014 The state of IEEE 802 . 3 bj 100 Gb / s Backplane Ethernet

100 Gigabit Ethernet over backplane is a subject of the current IEEE P802.3bj standardization effort. The 4 x 25 Gb/s design presents significant challenges to today's technology and several new methodologies were developed for the task. We explain the philosophy driving the design of the standard, present a summary of problems solved, and provide details on the most important methodologies. In particular we will discuss: the trade-off between PAM4 and PAM2 signaling; forward error correction; transmitter to channel to receiver boundaries; COM channel description and its advantages in closing the specification; jitter and noise budget; and measurement methodology. Matthew Brown: Matt is a Principal Systems Engineer at Applied Micro, responsible for architecture and specifications definition for a range of products including mixed signal and digital transceivers, Ethernet PHYs, packet processors, and OTN framers. He has over 30 years of experience developing system and device products addressing data communications and telecom applications at companies including Bell Northern Research, Northern Telecom (Nortel), Cambrian, Ceyba, and Quake. He has been a steady participant and contributor in various physical layer standards including 802.3ap, 802.3ba, 802.3az, 802.3bm, and SFP+, and is currently the Editor-In-Chief and clause editor for the IEEE 802.3bj 100 Gb/s Backplane and Copper Cable task force. He is a holder of ten US patents. Adam Healey: Adam is a Distinguished Engineer at LSI Corporation where he supports the development and standardization of high speed serial interface products. Adam is a regular contributor to the development of industry standards through his work in the IEEE 802.3 Ethernet working group and INCITS T11.2 Fibre Channel Physical Variants task group. Adam was chairman of the IEEE P802.3ap Task Force chartered to develop the standard for Ethernet operation over electrical backplanes at speeds of 1 and 10 Gb/s. He also served as editor-in-chief for the IEEE P802.3bj Task Force chartered to extend the Backplane Ethernet family to 100 Gb/s as well as define Energy Efficient Ethernet capabilities for 40 and 100 Gb/s Ethernet. Adam is currently chairman of the IEEE P802.3bj Task Force and vice chairman of the IEEE 802.3 Ethernet Working Group. Adam has also previously served as Secretary of the IEEE 802.3 Ethernet Working Group as well as technical committee chairman and Vice President of Technology for the Ethernet Alliance. Liav Ben Artsi: Liav is a Senior Signal Integrity Manager at Marvell Israel Ltd. Liav has worked at Marvell for the last 13 years, …