Date: 12/03/2012

40 Gb serial multiplex/demultiplex chipsets for CFP modules

Broadcom has introduced 40 gigabit speed capable two serial multiplex/demultiplex (mux/demux) chipsets for tri-rate CFP (C-form pluggable) modules and VSR/DPSK applications (very short reach/differential phase shift keying). Broadcom says they consume only two watts combined and 60 percent lower than the nearest competitor.

The Broadcom BCM84145 demux and BCM84146 mux chipset work together to receive and transmit data within 40G serial CFP modules. The BCM84147 demux and BCM84148 mux also receive and transmit 40G serial data and are targeted for VSR and DPSK applications. Both chipsets offer high-speed data rate support ranging from 39.8 to 44.6 Gbps. They are also available in standard 14mm x 14mm BGA (ball grid array) packages. Competing solutions require the use of ceramic packages and GPPO interfaces for high speed 40G I/Os. The use of standard BGA packaging results in a substantial decrease to the total system cost.

Key Features:

BCM84145 Demux
Receives 40G serial data (40GbE, OC-768, or OTU-3), demultiplexes and transmits on a 4-lane system interface
PRBS/OTU-3 frame pattern generation and detection

BCM84146 Mux
Receives data on 4-lane system interface, multiplexes data into one transmit serial stream
Programmable pre-emphasis and amplitude control on serial data output
DPSK/duo-binary pre-recorders

BCM84147 Demux
Enables replacement of older bipolar-based demux used in legacy VSR and 300-pin module market with advanced CMOS-based devices
Equalizer for ISI compensation
OIF compliant SFI-5.1 interface

BCM84148 Mux
Enables replacement of older bipolar-based mux used in legacy VSR and 300-pin module market with advanced CMOS-based devices
Programmable pre-emphasis and amplitude on serial data output
DPSK/duo-binary pre-recorders

All chips are now sampling with production volume slated for the first half of 2012.