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
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 defines the physical layer
specifications 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
specifications, significantly 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 defines the physical
layer specifications 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 specification (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 105°C.
Marvell Alaska C 88X5121 Dual 100 Gbps Ethernet Transceiver with Copper Cable and Backplane Drive Capability
BLOCK DIAGRAM
4x25G
4x25G
25G-LR Host Interface
IEEE 802.3BJ CL-91 RS-FEC
EEPROM
JTAG
Auto-Negotiation
MDIO
LED
Coe cient Training
100G-CR4/KR, 25G-CR/KR Capable SERDES
4x25G
4x25G
Fig 1. Marvell Alaska C 88X5121
FEATURES AND BENEFITS
SPECIAL FEATURES
•
Long reach host and line SERDES
•
Integrated Reed-Solomon FEC
•
Octal 25G mode
•
Integrated IEEE auto-negotiation and training
protocol
•
Fully autonomous equalizer adaptation
BENEFITS
•
Capable of compensating an Insertion Loss of up to 30dB without FEC
•
Ability to drive 100G-CR4 cables, 100G-KR4 backplanes and 100GSR4
optical modules
•
For low latency 25GbE Direct Attach cable links between servers and
Top of Rack switches
•
Seamless interoperability with IEEE-compliant devices from other vendors
•
Does not require intervention from host software
APPLICATIONS
• 100GbE/25GbE Data center switches
• 100G-KR4 backplanes
• OTL 4.4 and 32G Fibre Channel line cards
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 field 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.
Marvell Technology Group
www.marvell.com
CONTACT US:
For additional information, please visit our website at
www.marvell.com
for a Marvell sales o
representative in your area.
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