Multirate 40-Gb/s 1:4 Demux with CDR, VGA and Advanced Feature Set

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*Certain versions of this device are not available for sale in Germany or shipment to or from Germany, and these versions should not be used in any product destined for the German market.
45G serial-to-SFI-5.2/XLAUI/OTL3.4/STL256.4 demultiplexer (demux) for use in 300-pin 40G modules.
The BCM84145 has an Optical Internetworking Forum (OIF) SFI-5.2/XLAUI/OTL3.4/STL256.4-compliant four-bit wide transmit system data interface with a deskew channel operating from 2.488 Gb/s to 2.788 Gb/s. The BCM84145 has two Clock and Data Recovery (CDR) circuits that recover the clock and data from the received signals, and then demultiplexes and transmits the data on the SFI-5.2/XLAUI/OTL3.4/STL256.4 interface. There is an additional deskew lane for the SFI-5.2/XLAUI/OTL3.4/STL256.4 interface. The CDR and demultiplexer are fully integrated. The data is recovered by the integrated CDR. The recovered data is interleaved to the SFI-5.2/XLAUI/OTL3.4/STL256.4 interface along with a deskew channel copying data sequentially from each data channel. The SFI-5.2/XLAUI/OTL3.4/STL256.4 timing clock is generated from the recovered clock. The extracted data can optionally be fed to a PRBS detector.


  • Data rate support from 39.8 Gb/s to 44.6 Gb/s
  • Equalizer for PMD and ISI compensation
  • Status indicator for CDR lockdetect
  • RX decision threshold adjust
  • Core power supply: 1.0V
  • SFI-5.2/XLAUI/OTL3.4/STL256.4 CML I/O: 1.0V


  • 802.11 Wireless LAN Solutions
  • Smart Devices


Specification Value
Lifecycle Active
Distrib. Inventory No
I/O Controller
Bus Interface
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External Memory Interfaces