marvell alaska c 88X5121 overview the marvell? alaska? c 88X5121 is a fully integrated dual port 100 gbps device that performs all physical layer functions required to drive 100 gbps ethernet over a variety of media including optics, backplanes and passive copper cables. manufactured with 28 nanometer lithography, in a 17mmx17mm package footprint, the marvell 88X5121 enables low-power dissipation, high density 100gbe and 25gbe line card designs. the line interface of the 88X5121 is fully compliant to the ieee 802.3bj standard that de? nes the physical layer speci? cations for 100 gbps ethernet transmission over backplanes and copper cables. the device supports reed-solomon forward error correction function required for 100g-cr4 and 100g-sr4 operation, as well as auto-negotiation and coe cient training protocol required by the ieee 802.3 standards. key benefits ? fully compliant to ieee 802.3bj and 803.3bm standards for 100gbe transmission over optical media, passive copper cables and backplanes ? octal 25g mode for 25gbe and other low latency applications ? support for speed negotiation and coe cient training product description the marvell 88X5121 is a fully integrated dual port device that performs all physical layer functions required to drive 100gbps full duplex transmission over a variety of media. the 88X5121 connects to a mac or switch on its host interface over a 4x25gbps caui-4 link. the transmit drive and receiver equalization capabilities of the host interface are compliant to oif cei-25g lr speci? cations, signi? cantly exceeding caui-4 requirements. on the line interface, the device supports a variety of media types including single mode and multimode optical modules, passive and active copper direct attach cables, and copper backplanes. the line interface of the 88X5121 is fully compliant to the ieee 802.3bj standard that de? nes the physical layer speci? cations for 100gbps operation over backplanes and copper cables. the device supports fec feature, as well as auto-negotiation and coe cient training protocol required by the 802.3bj standard. for applications not requiring the fec functionality, the device also supports a low latency repeater mode where the functionalities associated with the physical coding sublayer (pcs) and fec are bypassed. in the this mode, the device can be used to drive low latency 25gbe direct attach cable links as well as backplanes and cables for non-ethernet tra c types such as otn and fibre channel. the eight lanes of the device can operate independent of the others in this mode, enabling simultaneous support for multiple standards. the 88X5121 supports wide band of operation (from 1.25gbps to 28.05gbps) supports a wide variety of standards and rates. the device also supports a 2 to 1 bit-multiplexing functionality that enables a 40gbe stream on the host side to be aggregated from 4x10gbps lanes to 2x20gbps lanes. this functionality can be used to double i/o density on legacy systems, as well as to expand an aggregated 40gbe stream to a standard 4x10gbps lane format. the 88X5121 supports auto-negotiation to 40gbps and operation at this speed. internal registers can be accessed via an mdio/mdc serial management interface which is compliant with the ieee 802.3 speci? cation (clause 45). an mdc frequency of up to 25 mhz is supported. the device includes internal prbs generators and ethernet packet generators and loopbacks to assist with test and debug. in addition, non-destructive eye monitoring is supported on all high speed i/os. the 88X5121 is housed in a 17mm x 17mm 256 pin fcbga package, and supports an operating temperature range from 0 to 105c. marvell alaska c 88X5121 dual 100 gbps ethernet transceiver with copper cable and backplane drive capability features ? dual port 100gbe phy ? octal 25g repeater ? dual 40gbe aggregator that enables aggregation of 40gbe from 4x10g lanes to 2x20g lanes ? ability to handle insertion loss of greater than 30db at nyquist without forward error correction (fec) ? line interface serdes that exceeds the equalization requirements for 100g-cr4 passive copper cables and 100g-kr4 backplanes ? oif25g-lr compliant long reach host interface serdes that exceeds ieee caui-4 requirements ? fully autonomous adaptive equalization on line and host receiver ? support for 100gbe/40gbe auto- negotiation and coe cient training protocol ? support for ieee 802.3bj reed-solomon forward error correction (r-s fec) functionality ? low latency repeater mode for applications not requiring fec capability with fully independent operation on each lane ? hole-free operation from 1.25gps to 28gbps ? programmable clock divide ratios ? recovered clock outputs for synce applications ? ethernet packet and programmable packet generation and checking ? non-destructive eye monitoring capability on all high speed lanes ? clause 45 mdc/mdio management interface ? junction temperature range of 0 to 105 ? small 17mm x 17mm fcbga package transceivers
copyright ? 2015. marvell. all rights reserved. marvell, the marvell logo, and alaska are registered trademarks of marvell. all other trademarks are the property of their respective owners. p/n marvell_88X5121_transceiver-03 10/15 marvell alaska c 88X5121 dual 100 gbps ethernet transceiver with copper cable and backplane drive capability features and benefits applications ? 100gbe/25gbe data center switches ? 100g-kr4 backplanes ? otl 4.4 and 32g fibre channel line cards special features benefits ? long reach host and line serdes ? capable of compensating an insertion loss of up to 30db without fec ? integrated reed-solomon fec ? ability to drive 100g-cr4 cables, 100g-kr4 backplanes and 100gsr4 optical modules ? octal 25g mode ? for low latency 25gbe direct attach cable links between servers and top of rack switches ? integrated ieee auto-negotiation and training protocol ? seamless interoperability with ieee-compliant devices from other vendors ? fully autonomous equalizer adaptation ? does not require intervention from host software fig 1. marvell alaska c 88X5121 block diagram 25g-lr host interface ieee 802.3bj cl-91 rs-fec 100g-cr4/kr, 25g-cr/kr capable serdes auto-negotiation coe?cient training jtag mdio eeprom led 4x25g 4x25g 4x25g 4x25g the marvell advantage: marvell chipsets come with complete reference designs which include board layout designs, software, manufacturing diagnostic tools, documentation, and other items to assist customers with product evaluation and production. marvell?s worldwide ? eld application engineers collaborate closely with end customers to develop and deliver new leading-edge products for quick time-to-market. marvell utilizes world-leading semiconductor foundry and packaging services to reliably deliver high-volume and low-cost total solutions. about marvell: marvell marvell (nasdaq: mrvl) is a global leader in providing complete silicon solutions and kinoma software enabling the ?smart life and smart lifestyle.? from mobile communications to storage, internet of things (iot), cloud infrastructure, digital entertainment and in-home content delivery, marvell?s diverse product portfolio aligns complete platform designs with industry-leading performance, security, reliability and e ciency. at the core of the world?s most powerful consumer, network and enterprise systems, marvell empowers partners and their customers to always stand at the forefront of innovation, performance and mass appeal. by providing people around the world with mobility and ease of access to services adding value to their social, private and work lives, marvell is committed to enhancing the human experience. as used herein, the term ?marvell? refers to marvell technology group ltd. and its subsidiaries. contact us: for additional information, please visit our website at www.marvell.com for a marvell sales o ce or representative in your area. marvell technology group www.marvell.com
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