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XRS10L120IL-F Datasheet(PDF) 1 Page - Exar Corporation

Part # XRS10L120IL-F
Description  SERIAL ATA II: PORT MULTIPLIER
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRS10L120IL-F Datasheet(HTML) 1 Page - Exar Corporation

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com
EXSTOR XRS10L120
SERIAL ATA II: PORT MULTIPLIER
JUNE 2009
REV. 1.06
FEATURES
GENERAL FEATURES
Three independent 3/1.5Gbps SATA ports.
Connects 1 host port to 2 device ports.
Supports 3/1.5Gbps rate detection/speed
negotiation.
Supports power down modes - Active, partial,
slumber and power down.
Advanced features configurable through MDIO
bus.
PORT MULTIPLIER LOGIC FEATURES
Low latency architecture.
Supports OOB signaling for SATA applications.
Internal
OOB
detectors
for
COMRESET/
COMINIT and COMWAKE.
HIGH SPEED I/O FEATURES
High speed outputs with programmable pre-
emphasis to drive long interconnects.
Selectable high speed input equalization for
optimum reception.
Compliant with SATA Gen-2i & Gen-2m
specification.
Enables reliable data transmission over 1 meter
of FR-4 and 4 meters or more of unequalized
copper cable.
Supports spread spectrum clocking (SSC) to
reduce EMI.
PHYSICAL FEATURES
CMOS 0.13 Micron Technology
Single 1.2 V Power Supply
-40°C to 85°C Industrial Temperature Range
No heatsink or airflow required
64-Pin QFN Package
1.0
INTRODUCTION
The XRS10L120 provides the advantages of the
Serial ATA II Port Multiplier implementations for Serial
ATA II systems at 3.0 Gbps and 1.5 Gbps. The
XRS10L120 offers a leading solution for propagation
of high data rate Serial ATA products in a wide variety
of applications. The integration of Serial ATA PHY
links, a variety of digital logic capabilities, rate adjust
FIFOs, integrated low-cost clock oscillator support,
test and loopback features is achieved in a low cost
and lower power implementation.
The port multiplier function is used when one active
host has to communicate with multiple SATA drives.
The XRS10L120 supports up to 2 SATA drives and
utilizes the full bandwidth of the host connection.
The XRS10L120 includes enhanced features such as
staggered HDD spin-up, power management control,
hot plug capability and support for legacy software.
The XRS10L120 acts as a retimer, maintaining
independent signaling domains between the drives,
hosts and the external interconnect.
The high-speed serial input feature: selectable
equalization and the high-speed serial output feature:
programmable
pre-emphasis
can
be
used
to
compensate for ISI (Inter-Symbol Interference) and
increase maximum cable distances.
XRS10L120 meets tight jitter budgets in SATA
applications. Exar's serial I/O technology enables
reliable data transmission over 1 meter of FR-4 and 4
meters of unequalized copper cable.
Host and drive port speeds can be mixed and
matched, based upon inherent data rate negotiation
present in the SATA II specifications.
The MDIO bus allows simple configuration of the
XRS10L120 when needed.
Receive equalization,
transmit amplitude and pre-emphasis and SSC
control are all configurable via the 2-wire MDIO
interface
To summarize, the port multiplier functionality in the
XRS10L120 allows the system designer to increase
the number of serial ATA connections in an enclosure
that does not have a sufficient number of serial ATA
connections for all of the drives in the enclosure.
STANDARDS COMPLIANCE
The XRS10L120 is compliant with the following
industry specifications:
Serial ATA, Revision 1.0a
Serial ATA II: Extensions to Serial ATA 1.0a,
Revision 1.2
Serial ATA II PHY Electrical Specifications,
Revision 1.0
Serial ATA II: Port Multiplier, Revision 1.2
Serial ATA II: Revision 2.6


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