Comms chips

Xilinx Preps for 400G

Xilinx Inc. (Nasdaq: XLNX) has demonstrated 28Gbit/s transceivers in its Virtex-7 Field Programmable Gate Array (FPGA), a key step toward next-generation 100Gbit/s optical interfaces. (See Xilinx Demos 28G Transceivers.)

Why this is important
It's nifty for 100Gbit/s networking, because 25Gbit/s electronics (more properly 28Gbit/s, when Forward Error Correction (FEC) and other overhead is added) will lead to smaller and lower-power devices than 10Gbit/s electronics allow. But it's also crucial for the next step beyond 100Gbit/s, whether that's 400Gbit/s or 1Tbit/s. Xilinx says Virtex-7 has the room for all the trappings of 400Gbit/s Ethernet -- media access controllers (MACs), Interlaken interfaces, and the like.

There's a competitive angle, too. FPGA rival Altera Corp. (Nasdaq: ALTR) announced in April that it would have 28Gbit/s transceivers on its FPGAs, and the company demonstrated them at Milcom, a military-technology show, early this month.

For more...
Here's some further reading about high-end FPGAs and speeds beyond 100 Gbit/s.

— Craig Matsumoto, West Coast Editor, Light Reading

spc_markl 12/5/2012 | 4:18:13 PM
re: Xilinx Preps for 400G


There has been a certain amount of hype about OFDM since the bubble days.  I remember asking back in the early part of the decade, why are there only 2 1/2 suppliers in this wild market, if it is a viable technology?  As it turns out, once we go beyond 100G, OFDM is iikely to be important.

Mark Lutkowitz, Telecom Pragmatics


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