Product Brief
Marvell® Alaska C 88X5121
Dual 100 Gbps Ethernet Transceiver with Copper Cable and Backplane Drive
Capability
FEATURES
MARVELL ALASKA C 88X5121 OVERVIEW
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Dual Port 100GbE PHY
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 deꢀnes the physical layer
speciꢀcations 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 coefficient training protocol required by the IEEE 802.3 standards.
Octal 25G repeater
Dual 40GbE aggregator that enables
aggregation of 40GbE from 4x10G lanes
to 2x20G lanes
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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
KEY BENEFITS
• Fully compliant to IEEE 802.3BJ and 803.3BM standards for 100GbE transmission over optical media,
passive copper cables and backplanes
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OIF25G-LR compliant long reach host
interface SERDES that exceeds IEEE
CAUI-4 requirements
• 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.
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Fully autonomous adaptive equalization
on line and host receiver
Support for 100GbE/40GbE auto-
negotiation and coe˜cient training
protocol
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
speciꢀcations, signiꢀcantly exceeding CAUI-4 requirements.
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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
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 deꢀ nes the physical
layer speciꢀ 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.
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Hole-free operation from 1.25Gps to
28Gbps
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Programmable clock divide ratios
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.
Recovered clock outputs for SyncE
applications
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Ethernet packet and programmable
packet generation and checking
Non-destructive Eye monitoring
capability on all high speed lanes
The 88X5121 supports wide band of operation (from 1.25Gbps to 28.05Gbps) supports a wide variety of
standards and rates.
Clause 45 MDC/MDIO management
interface
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.
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Junction temperature range of 0 to 105°
Small 17mm x 17mm FCBGA package
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 speciꢀcation (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 105ꢁC.
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