PM3350 ELAN 8 X10
ELAN 8X10
DATA SHEET
PMC-970109
ISSUE 3
8 PORT ETHERNET SWITCH
TYPICAL SYSTEM APPLICATIONS
Simple 8-Port Switch
The ELAN 8x10 chip can act as a stand-alone managed or unmanaged switching
device in low-cost, compact switch applications. Such a switch can be created from
ELAN 8x10 chips (one for every 8 ports), a bank of two 256k x 16-bit 60 nsec EDO
chips per ELAN 8x10 chip, a 32k x 8-bit EPROM or EEPROM for initialization and
configuration information, two LXT944 or similar quad Ethernet Interface Adapters, and
suitable passive components (filters, transformers, crystal oscillators, etc.) A block
diagram of a typical 8-port 10BaseT stackable switch is given below. The PCI
expansion bus allows multiple ELAN 8x10 switch assemblies to be easily stacked up to
a maximum of 64 10Mbit/s ports.
PCI Bus Expansion Bus
Quad
10BaseT
10BaseT
Ports 1-4
ELAN 8x10
Interface
PM3350
Quad
10BaseT
10BaseT
Ports 5-8
Interface
EDO DRAM
EEPROM
Managed 8-Port Ethernet Switch
The above system will operate as a fully managed system simply by replacing the 32k x
8-bit EEPROM with a 256k x 8-bit EPROM or EEPROM containing the SNMP agent,
support firmware, spanning tree, and TCP/IP stack.
Low-cost 10/100 Mbit/s Switch
The ELAN 8x10 chip can be part of a 10/100 switch using the ELAN 1x100 10/100
Mbit/s switch chip. Together they can form a workgroup or desktop switch supporting a
high-speed server or backbone port in low-cost, compact Ethernet switching hub
applications. Such a switch can be created from one or two PM3351 devices (one for
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND PMC-SIERRA, INC. CUSTOMERS ONLY
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PMC [ PMC-SIERRA, INC ]
