For new design, we would recommend the CY7C924ADX. CY7C924ADX is superior to the CY7C9689A. While CY7C9689A uses 4B/5B encoding, CY7C924ADX uses 8B/10B encoding and provides superior functionality. The 8B/10B encoding has been adopted widely in the industry for applications such as Fiber Channel, DVB-ASI, Gigabit Ethernet, etc...
CY7C9689A is designed as a replacement for AMD TAXIchip. We recommend to use this chip only for such an application.
Note: TAXIchip and TAXI are registered trademarks of Advanced Micro Devices, Inc.
TAXI-compatible HOTLink Transceiver (http://www.cypress.com/?rID=13677)