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VITESSE
SEMICONDUCTOR CORPORATION
Data Sheet
VSC7121
Description
• 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
Quad Port Bypass Circuit for 1.0625 Gbit/sec Fibre Channel Arbitrated Loop Disk Arrays
• TTL Bypass Select • High Speed, PECL I/O’s Referenced to VDD. • 0.5W Typical Power Dissipation • 3.3V Power Supply • 44-Pin, 10mm PQFP
The VSC7121 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.