!
User-selectable, on-chip receive termination at either 100
or 150
!
Speed independent Tx and Rx paths aid in Fibre Channel
Auto-Speed Negotiation Allows the device to migrate as
the specification evolves
!
Device can be strapped for 1 or 2Gb/s operation Supports
dual speed storage applications
!
World-class signal integrity for jitter compliance Reduces
debug and redesign efforts
!
Two digital Signal Detect Units to detect the presence of
valid Fibre Channel encoded serial data - Improves signal
detect reliability
!
User selectable Pre-Emphasis on all high-speed outputs -
distorts outputs signal for improved signal driving over long
trace and cable distances
!
106.25MHz reference clock
!
5V-tolerant LVTTL inputs Provides design flexibility and
backward compatibility
!
Cable equalization on all high-speed inputs Manages and
corrects signal latency and distortion
!
Single 2.5V supply - Reduces wiring complexity
!
100-pin, 14mm exposed pad TQFP package - Ideal for compact
JBOD designs
F E A T U R E S :
!
Industry's first IC with six Port Bypass Circuits (PBC)
supporting both 1.0625Gb/s and 2.125Gb/s Fibre Channel
data rates Dual mode provides flexibility by having one
device for new and legacy designs
!
Two FibreTimerTM Cells configurable as:
- Repeaters for low latency
- Retimers for true Fibre Channel Compliance
- Reduces external retimer components, provides design
flexibility by allowing mixing and matching of the functions
for design optimization
!
Digital design of the FibreTimers produce a device that is well
controlled over voltage, process and temperature variations
Provides a more robust and reliable design
VSC7147 and VSC7147-01 - Hex PBC with Dual Repeater/Retimer
DATACOM PRODUCTS
PB-VSC7147-002
VSC7147
InSpeedTM is a registered trademark of Vixel Corporation.
741 Calle Plano
Camarillo, CA 93012
Tel: 805.388.3700
Fax: 805.388.7565
www.vitesse.com
Your Partner for Success.
For more information on Vitesse Products visit the Vitesse web site
at www.vitesse.com or contact Vitesse Sales at (800) VITESSE
or sales@vitesse.com
2002 Vitesse Semiconductor Corporation
V S C 7 1 4 7 A P P L I C A T I O N S :
VSC7147 and VSC7147-01 - Hex PBC with Dual Repeater/Retimer
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.
VSC7147
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.
G E N E R A L D E S C R I P T I O N :
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 TimersTM.
Repeater
Repeater
Two
FibreTimer
TM
Functions
PBC 0
PBC 1
PBC 2
PBC 3
PBC 4
PBC 5
Retimer
PBC 5
PBC 4
PBC 3
PBC 2
PBC 1
PBC 0
Connector
1.0625 or
2.125 Gb/s
FC-AL Port
VSC7147 Hex Port Bypass Circuit
VSC7147
Drive
1
Drive
2
Drive
3
Drive
4
Drive
5
Drive
6
Drive
12
Drive
1
1
Drive
10
Drive
9
Drive
8
Drive
7
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