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Date: 20-09-11

100 Gb Ethernet CMOS PHY and TIA/limiting amplifier for Ethernet receivers

Inphi Corporation has made available of its low power100 Gigabit Ethernet (GbE) CMOS PHY chip-set solutions that support the IEEE 802.3ba standard and target next generation high-density 100G line cards. Based on Inphi's iPHY architecture announced in March , the new chips are IN112510 100GbE CMOS Gearbox (GB) and IN012525 100GbE CMOS Clock Data Recovery (CDR). The iPHY IN112510 is a single-chip, low-power PHY for 10:4 gearbox applications for 100GbE and OTU4 high-density 100G line cards with 25-28 Gbps electrical interfaces. The iPHY IN012525 is a low-power CDR for 100GbE and OTU4 next generation 100G modules

"Inphi is proud to deliver on the iPHY architecture and be the first to sample the industry's lowest power CMOS 100GbE Gearbox and CDR PHY semiconductors for line cards and modules enabling next generation 100G platforms," said Siddharth Sheth, Vice President of Marketing for Inphi's high-speed connectivity products. "Our industry-leading PHY design metrics - power, footprint, integration - position us to use these devices across data center, enterprise and service provider applications. As the market transitions away from the power hungry and area intensive SiGe technology based CFP modules towards lower power, higher density CMOS based CFP and CFP2 line cards, Inphi's PHY offerings will enable and lead that transition."

"Video, rich IP content, streaming media, and bandwidth-hungry mobile and cloud-based enterprise apps are driving massive upgrades of datacenter and service provider networks. With fat pipes needed to accommodate the tsunami of data generated by these applications, the demand for 100GbE is in the here and now," said John D'Ambrosia, chair, Ethernet Alliance and past chair, IEEE 802.3ba 40G/100G Ethernet Task Force. "Today's announcement from Inphi is an important step in allowing system OEMs and optical module vendors to build next generation 100GbE systems that are both 802.3ba-compliant and key to 100GbE's success in the market."

According to Jag Bolaria, Senior Analyst at The Linley Group, "We are expecting strong growth in the 100GbE market, especially in the enterprise and data center segments, with the advent of smaller form factor, lower power 100G optical modules. When coupled with Inphi's low-power, highly integrated CMOS 100G PHY products, the market's move to high-density 100G systems will become a reality."

Technical features of IN112510 includes:
Supports 100G BASE-LR4/ER4 and OTU4 28 Gbps operation for OTL4.4
Optimized for extremely low-latency to allow use in ultra low latency applications
Programmable transmit and adaptive receive equalization on all SerDes interfaces with fine granularity and control which allow performance to surpass IEEE CAUI, CEI-11G SR and CEI-28G VSR specifications
Numerous self-test and loopback modes that allow diagnostic monitoring of channel and system parameters
Eye-scan and monitor on all SerDes receiver interfaces for link margin and stress testing in a lab or production test environment
Innovative package design that allows denser line cards
Optimizations for next generation CFP2-based line card designs
Single-chip low power solution that allows next generation optimized CFP modules

The features of iPHY IN012525 includes:
Supports 100G BASE-LR4/ER4 and OTU4 28Gbps operation
Programmable transmit and adaptive receive equalization on all SerDes interfaces with fine granularity and control which allow performance to surpass CEI-28G VSR specifications
Self-test modes that allow diagnostic monitoring of channel and system parameters
Eye-scan and monitor on all SerDes receiver interfaces for link margin and stress testing in a lab or production test environment
Optimizations for next generation CFP2 modules

Inphi Corporation has also announced the sampling of new IN2841TA, a transimpedance amplifier (TIA)/limiting amplifier (LIA) for 100 Gbps Ethernet (GbE) receivers. Interoperable with Inphi's iPHY 100GbE CMOS PHY solutions, the Inphi IN2841TA TIA/LIA is designed to support data rates up to 28 Gbps and offers a wide input dynamic range due to its low input referred noise and its high input overload. The IN2841TA has low power consumption and operates off of a standard single +3.3 V power supply.

"We worked closely with Inphi to design their high-performance Inphi IN2841TA into our 100Gbps Receiver Optical Sub-Assemblies (ROSAs) because it allows us to offer our customers the lowest power, fully-integrated 100GbE receiver solution to enable their next generation CFP2 products," said Sven Krüger, Vice President Product Management at Cube Optics.

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