2953 Bunker Hill Lane, Suite 300, Santa Clara, CA 95054, Phone: (408) 217-7300 Fax: (408) 217-7350, sales@inphi.com
Copyright © 2010−2014 Inphi Corporation. All rights reserved. Inphi is a registered trademark of Inphi Corporation. Document Number: 450108 – 2.0
CS4315 Four 10 Gbps CDRs with EDC
Overview
The CS4315 Electronic Dispersion Compensation Device (CS4315 EDC) is highly integrated with four 10 Gbps clock and data
recovery (CDR) circuits. The two receive channels have the optional integrated Electronic Dispersion Compensation (EDC)
capability. This functionality supports 2 SFP+ modules that can be either limited or linear. Enabling the EDC capability allows the
device to operate with linear SFP+ optical modules to extend the operating range of 62.5 ìm and 50 ìm multimode fiber to 220
meters and beyond, and greater than 7 meters of Direct Attach Copper cable.
The CS4315 EDC will enable the 10 GE enterprise, metro or core market segments across all form factors through their size, low
power, and availability.
The CS4315 EDC enables the industry move to SFP+ by increasing multi mode fiber reach to over 220 meters; allowing a single
board design all SFP+ interface types and making it possib le for higher dens ity line cards due to low power and small footprint.
Enabling 10G GB SFP+ and Backplane Applications
Lower cost, lower power and higher port densities are driving SFP+ to become the predominant optical module format of these
new 10G platforms. The lead application for the CS4315 EDC is enabling the migration of datacom and telecom routers and
switches to the SFP+ optical module form factor. Four SFP+ reach applications have been standardized for 10 GbE networks:
10GBASE-SR, -LR, -LRM, and Direct Attach Copper. The CS4315 EDC supports all four applications.
The CS4315 EDC incorporates two bi -directional 10 Gbps paths to support the increased port densities. Additional features of the
CS4315 EDC include various lookbacks, a complete set of programmable Rx and Tx path functionality, such as output
preemphasis, and full 1 GbE data rate support. Packaged in a small 12mm by 12mm flip-chip package, the CS4315 EDC has an
integrated microcon troller to enable auto adapation.
Successful interoperability testing of the CS4315 EDC with SFP+ optical modules and Direct Attach Copper cables from leading
vendors has pro vided the broadest col lection of real life sys tem application data av ailable in the industry with co ver age for all four
SFP+ applications: SR, LR, LRM, and Direct Attach Copper cable.
The receive and transmit CDRs on the CS4315 have an operating frequency range of 9.95 to 11.3 Gbps. The CDRs also support
8G/4G/2G/1G Fibre Channel r ates. The CS4315 also includes a 10GBASE-KR compli ant 3-tap transmit pre-emphas is. The transmit
pre-emphasis and receive equalization, along with the extended operating frequency range, make the CS4315 an ideal solution
for backplane link extension, in 10GBase-KR, 10G telecom, and 10G/8G CS4212 applications.
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2953 Bunker Hill Lane, Suite 300, Santa Clara, CA 95054, Phone: (408) 217-7300 Fax: (408) 217-7350, sales@inphi.com
Copyright © 2010−2014 Inphi Corporation. All rights reserved. Inphi is a registered trademark of Inphi Corporation. Document Number: 450108 – 2.0
Functional Description
Functionality Designed to meet the requirements for systems and modules designed to SFF-8431
for both linear and limited
Equalizer capability designed to exceed the requirements of IEEE 802.3aq*
10GBASE-LRM and 10GBASE-KR
XFI interface complies to XFP MSA specifications
Optional support of 1.25 Gbps (IEEE 802.3ae* 1 GE)
Integrated design that does not require external processors or memory
Transmit Path 3 tap pre-empahsis compliant to 10GBASE-KR specifications
Programmable output voltage amplitude
Option to invert the polarity of TX+ and TX- signals
Integrated limiting amplifier with programmable equalizer
Operating range of 9.95 - 11.3 Gbps, 8.5 G, 6.25 G, 4.25 G, 2.5 G, 2.125 G,
1.0625 G, and 1.25 G
Programmable LOS level
Exceeds XFP jitter generation requirements
Receive Path Option of pre-emphasis with level programmability
Integrated EDC with option to bypass
Driver with programmable output voltage amplitude
Option to invert the polarity of RX+ and RX- signals
Integrated AGC controlled by DSP
Operating range of 9.95 - 11.3 Gbps, 8.5 G, 6.25 G, 4.25 G, 2.5 G, 2.125 G,
1.0625 G, and 1.25G
Exceeds XFP jitter generation and jitter tolerance requirements
EDC Optional EDC Equalizer exceeds the comprehensive stressed receiver test described
in 10GBASE-LRM specification
Adaptation algorithm does not require any external processor or memory
Default adaptation algorithm can be field upgradeable
Advanced methods to analyze adaptation success including line SNR
Continuously tracks and adapts to variations in channel characteristics
Physical
Characteristics 12x12mm
121-pin BGA
1.0mm ball pitch
Test and Monitoring Multiple loopback modes
Built-in PRBS generator and checkers
Extensive set of performance and status registers
GPIO pins with user programmable functionality
Registers and status programmable through MDIO, SPI, or I2C management
interface
Serial management interface can be used to reset and read error and statistical
counters
JTA G 1149 Scan support
2953 Bunker Hill Lane, Suite 300, Santa Clara, CA 95054, Phone: (408) 217-7300 Fax: (408) 217-7350, sales@inphi.com
Copyright © 2010−2014 Inphi Corporation. All rights reserved. Inphi is a registered trademark of Inphi Corporation. Document Number: 450108 – 2.0
CS4315 EDC Diagram
