Functional Description
The CY7C9689 HOTLink Transceiver is a point-to-point communications building block allowing the transfer of data over high-speed serial links (optical fiber, balanced, and unbalanced copper transmission lines) at speeds ranging between 50 and 200 MBaud. The transmit section accepts parallel data of selectable widths and converts it to serial data, while the receiver section accepts serial data and converts it to parallel data of selectable widths. Figure 1 illustrates typical connections between two independent host systems and corresponding CY7C9689 parts. The CY7C9689 provides enhanced technology, increased functionality, a higher level of integration, higher data rates, and lower power dissipation over the AMD AM7968/7969 TAXIchip products.

Features
• Second-generation HOTLink® technology
• AMD™ AM7968/7969 TAXIchip™ compatible
• 8-bit 4B/5B or 10-bit 5B/6B NRZI encoded data transport
• 10-bit or 12-bit NRZI pre-encoded (bypass) data transport
• Synchronous TTL parallel interface
• Embedded/Bypassable 256 character Transmit and Receive FIFOs
• 50-to-200 MBaud serial signaling rate
• Internal PLLs with no external PLL components
• Dual differential PECL-compatible serial inputs and outputs
• Compatible with fiber-optic modules and copper cables
• Built-In Self-Test (BIST) for link testing
• Link Quality Indicator
• Single +5.0V ±10%supply
• 100-pin TQFP