MDI
http://mdipower.com/

Xilinx

Peregrine Semiconductor
www.psemi.com

Epcos
http://www.epcos.com

Source Photonics

Clare

Marvell
http://marvell.com

HALO
http://www.haloelectronics.com/  

EPT
http://www.ept.de/  

PDI
http://www.pdixtal.com/  

PMC-Sierra
http://www.pmc-sierra.com/  

Aethercomm
http://www.aethercomm.com/  

Renesas
http://eu.renesas.com/  

Conexant
http://www.conexant.com/  

Cirrus Logic
http://www.cirrus.com/en/  

Cortina
www.cortina-systems.com  

P-DUKE
www.pduke.com  

Advanced Interconnections Corp.
http://www.advanced.com/  

Zarlink
http://www.zarlink.com/  

Infineon
http://www.infineon.com/cms/en/product/index.html