Quad Port Bypass Circuit For 1.0625 Gbit/sec Fibre Channel Arbitrated Loop Disk Arrays

The VSC7121 is a Quad Port Bypass Circuit (PBC). Four Fibre Channel PBCs 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. PBCs are used within FC-AL disk arrays to allow for resiliency and hot swapping of FC-AL drives. Using a VSC7121 in a single loop of a disk array is illustrated in Figure 2: Disk Array Application. FC- AL drives are all expected to be dual loop. The VSC7121 is cascaded in a manner such that all the 7121s inter- nal PBCs are used in the same loop. For dual loop implementations, two or more VSC7121s should be used. Allocating each VSC7121 to only one of two loops preserves redundancy, prevents a single point of failure and lends itself to on-line maintainability. By Vitesse Semiconductor Corp
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VSC7121 Pinout will be updated soon..., now you can download the pdf datasheet to check the pinouts !
VSC7121 circuits will be updated soon..., now you can download the pdf datasheet to check the circuits!

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