General Description
The VSC7122 is a Quad Port Bypass Circuit (PBC). Four Fibre Channel PBC’s are cascaded into a single part to minimize part count, cost, high frequency routing, and jitter accumulation. Port Bypass Circuits are used to provide resiliency in Fibre Channel Arbitrated Loop (FC-AL) architectures. PBC’s are used within FC-AL disk arrays to allow for resiliency and hot swapping of FC-AL drives.
   
Features
• Supports ANSI X3T11 1.0625 Gbit/sec
    FC-AL Disk Attach for Resiliency
• Fully Differential for Minimum
    Jitter Accumulation.
• Quad PBC’s in Single Package
• TTL Bypass Select
• High Speed, PECL I/O’s Referenced to VDD.
• 0.35W Typical Power Dissipation
• 3.3V Power Supply
• 44-Pin, 10mm PQFP