VSC7147 Datasheet, PDF (2/2 Pages) Vitesse Semiconductor Corporation – Hex PBC with Dual Repeater/Retimer

VSC7147
VSC7147 and VSC7147-01 - Hex PBC with Dual Repeater/Retimer
GENERAL DESCRIPTION:
The VSC7147 expands Vitesse's wide offering of
Fibre Channel products with an IC for the
growing 2.125Gb/s Fibre Channel storage
market. The device features six Port Bypass
Circuits (PBC) that support both 1.0625Gb/s and
2.125Gb/s Fibre Channel data rates. The
VSC7147 enables Fibre Channel Disk Arrays, JBODs (Just a Bunch of
Disks) and storage subsystem equipment designers to integrate more
ports and disk drives and maintain consistently high signal quality using
fewer components.
In addition to the PBCs that steer serial Fibre Channel signals to disk drives and
bypass faulty ports, the VSC7147 features dual FibreTimer Repeater/Retimer cells.
VSC7147 APPLICATIONS:
Each FibreTimer cell contains an all-digital clock recovery unit (CRU)
that can be configured as either a Repeater or a Retimer. In the
repeater mode, recovered data is retransmitted to a recovered clock,
allowing for improved jitter attenuation and low latency. In the
retimer mode, recovered data is re-transmitted synchronously to a
local reference clock with no jitter transfer ensuring compliance to
Fibre Channel signal quality specifications.
The VSC7147-01 adds an analog signal detect (ASD) function which
helps the signal detection capabilities of the Fiber Timers™.
1.0625 or
2.125 Gb/s
FC-AL Port
Repeater
PBC 0
PBC 1
Repeater
Two FibreTimer^TM Functions
PBC 2
PBC 3
PBC 4
PBC 5
VSC7147 Hex Port Bypass Circuit
Retimer
VSC7147
PBC 5
PBC 4
PBC 3
PBC 2
PBC 1
PBC 0
Several VSC7147’s can be cascaded together to create a JBOD. The flexibility of the
FibreTimers allow repeater and retimer functions to reside where they make the most sense for
the backplane board design.
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or [e-mail]
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