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December 22, 2011

Broadcom unveils new 40G physical layer transceiver chipset

Leverages CMOS technology for 40G optical transmission using DQPSK modulation

By CBR Staff Writer

Semiconductor offerings firm for wired and wireless communications Broadcom has introduced its next generation 40G physical layer transceiver (PHY) chipset, which designed to address the need for higher bandwidth and lower power in Optical Transport Networks (OTN).

Broadcom’s new 40G PHY chipset leverages CMOS technology for 40G optical transmission using DQPSK modulation, providing high reliability, lower power consumption and shorter fab cycle time for long haul DWDM transmission.

Broadcom’s 40G PHY chipset includes BCM84141 demultiplexer (Demux) and BCM84142 multiplexer (Mux), which will work together to deliver a significant increase in network bandwidth and scale while significantly reducing power consumption by more than 50%.

In addition, Broadcom’s 40G PHY chipset provides a cost-effective, reliable offering to meet operator needs today and the building blocks required for future optical transmission speeds up to 100G and beyond and the chipset integrates high performance more than 20 Gbps IOs, which is essential for developing future devices that will support 100G optical transmission.

BCM84141 Demux features include: 2×23 Gbps to SFI-5.1 demux provides two receivers for data recovery on I and Q channels; automatic or manual alignment of I and Q channels fully integrated; serial control/serial peripheral interface (BSC/SPI) port for status monitoring; and Mux + Demux power dissipation of 2.3W.

BCM84142 Mux features include: a fully integrated multiplexer and precoder to accept SFI-5.1 data; deskew channel for multiplexing to 2×23 Gbps; two transmit data streams operating from 21.5 to 22.8 Gbps; source centered clock with frequency of 21.5 to 22.8 GHz or divided-by-2; skew control capability between the I and Q channels and high-speed clock output; and an internal phase detector for clean-up phased lock loop (PLL) implementation.

Broadcom High Speed Interconnect Products vice-president & general manager Lorenzo Longo said Broadcom’s new CMOS 40G PHY chipset is a key breakthrough for Optical Transport Networks and is the first in a new generation of high speed PHYs for 40G/100G applications in Broadcom’s product pipeline.

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"The increasing demand for higher bandwidth content continues to push the industry rapidly toward 40G and beyond. At the same time, optical transport network suppliers face increasing pressure to deliver products that offer higher bandwidth and better reliability while consuming less power," said Longo.

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