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Broadcom 40G PHY targets OTNs

Posted: 22 Dec 2011     Print Version  Bookmark and Share

Keywords:transceiver  PHY  chipset  optical transport networks 

Broadcom Corp. launches its next generation 40G PHY chipset targeting optical transport networks (OTN) that need higher bandwidth and lower power. The chipset claims to be the industry's first to leverage CMOS technology for 40G optical transmission. It uses DQPSK modulation for high reliability, low power consumption and shorter fab cycle time for long haul DWDM transmission.

Demand for additional network bandwidth is being driven by broadband consumer applications such as streaming video, HD video and on-demand services. Broadcom's 40G PHY chipset, including the BCM84141 demux for receiving data, and the BCM84142 mux for transmission, work together to deliver an increase in network bandwidth and scale while significantly reducing power consumption by more than 50 per cent. Broadcom's 40G DQPSK chipset is currently in production with multiple customers.

The high speed network port market is estimated to hit Rs.2.33 lakh crore ($52 billion) in 2015 as operators continue to upgrade legacy networks to manage the increasing global demand for higher bandwidth. At the same time, operators are looking to minimise complexity, cost, and power consumption. Broadcom's 40G PHY chipset provides a cost-effective, reliable solution to meet operator needs today and the building blocks required for future optical transmission speeds up to 100G and beyond. Broadcom's 40G PHY chipset integrates high performance more than 20Gbps I/Os, which is essential for developing future devices that will support 100G optical transmission.

The BCM84141 demux features 2 x 23Gbps to SFI-5.1 demux provides two receivers for data recovery on I and Q channels. It has options for automatic or manual alignment of I and Q channels that are fully integrated. It has serial control/serial peripheral interface (BSC/SPI) port for status monitoring. Mux + demux power dissipation is at 2.3W.

The BCM84142 mux features fully integrated multiplexer and precoder to accept SFI-5.1 data. It offers deskew channel for multiplexing to 2x23Gbps and two transmit data streams operating from 21.5- to 22.8Gbps. Its source centred clock has a frequency of 21.5- to 22.8GHz or divided-by-2. It features skew control capability between the I and Q channels and high-speed clock output and internal phase detector for clean-up phased lock loop implementation.

The BCM84141 and BCM84142 are now available in production release status.

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