
PM8380
Preview
4-Channel Multiplexer and Link Extender for SAS, SATA, Ethernet and FC
QuadSMX 3G
PMC-2030351
Issue 3
PROPRIETARY AND CONFIDENTIAL TO PMC
-
SIERRA, INC., 
AND FOR ITS CUSTOMERS’ INTERNAL USE
 Copyright PMC-Sierra, Inc. 2004. 
All rights reserved. 
FEATURES
GENERAL - SATA AND SAS
 Four bi-directional 2:1 SATA or 
SAS multiplexer/demultiplexer.
 Compliant with SAS Internal and 
External specification.
 SATA Gen1i, Gen1x, Gen2i, 
Gen2x compliant.
 In the downstream direction, the 
QuadSMX 3G demuxes the 
initiator-side receive ports to either 
the A or B device-side transmit 
ports.
 In the upstream direction, the 
QuadSMX 3G selects either the A 
or B device-side receive port to 
output on the initiator-side transmit 
ports.
 Passes-thru out-of-band (OOB) 
signaling.
 Internal OOB detectors for 
COMSAS, COMRESET/COMINIT 
and COMWAKE.
 Provides port reordering to support 
standard SATA/SAS 4 channel 
connectors and easier PCB 
routing.
GENERAL - ETHERNET AND 
FIBRE CHANNEL
 Four channel bi-directional Gigabit 
Ethernet and 10 Gigabit Ethernet 
(XAUI) link extender and 2:1 serial 
multiplexer/demultiplexer.
 Four channel bi-directional 1G,2G 
and 10G Fibre Channel link 
extender and 2:1 serial 
multiplexer/demultiplexer
 Provides transmit redundancy for 
Ethernet and Fibre Channel Switch 
Applications. In this case,data is 
broadcast to both Port A and
Port B.
HIGH-SPEED I/O
 1.0 Gbit/s to 3.2 Gbit/s operation.
 Automatic amplitude control for 
SATA and SAS applications.
 Programmable receive 
equalization, transmit pre-
emphasis and transmit output 
swing. 
 Integrated resistive termination 
and receive AC coupling.
 Analog interfaces support SATA 
and SAS hot plug.
BLOCK DIAGRAM
RXA+/-[3:0]
TX+/-[3:0]
2 to 1
Mux
Serial
Rx
Serial
Rx
Serial
Tx
OOB
Detect
OOB
Detect
OOB
Control
2 to 1
Mux
4 instances
Serial
Tx
Serial
Tx
OOB
Control
Serial
Rx
OOB
Detect
Status and
Control
Tx Amplitude
Control
RXB+/-[3:0]
TXA+/-[3:0]
TXB+/-[3:0]
RX+/-[3:0]
SEL[3:0]
SCL
Two Wire
Interface
SDA
RSTB
TXAPREM[1:0]
TXBPREM[1:0]
RXAEQUAL[1:0]
RXBEQUAL[1:0]
SYSCLK
SASLVL
RXSWIZB
RBIAS
TWADR[2:1]