PM3351 Просмотр технического описания (PDF) - PMC-Sierra

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производитель

PM3351

SINGLE PORT FAST ETHERNET SWITCH

PMC-Sierra 

DATA SHEET

PMC-970113

ISSUE 3

PM3351 ELAN 1X100

SINGLE PORT FAST ETHERNET SWITCH

TYPICAL SYSTEM APPLICATION

Low-cost 10/100 Mbit/s Switching Hub

The PM3351 chip can act as a high-speed server or backbone port in low-cost,

compact Ethernet switching hub applications. Such a hub can be created from one or

more PM3351 devices (one for every 100 Mbit/s port required), 1 to 7 PM3350 chips

(one for every eight 10 Mbit/s ports required), a bank of memory per device (60 nsec

DRAM for each PM3350, 15 ns SRAM for each PM3351) for holding frame buffers and

switching tables, a single 32k x 8-bit EEPROM device for configuration information, two

LXT944 10BaseT interface adapters per PM3350 chip, one LXT 970 100 Mbit/s PHY

device per PM3351, and suitable passive components (filters, transformers, crystal

oscillators, etc.). A block diagram of a typical 32-port 10BaseT stackable switching hub

with two 100 Mbit/s server/backbone ports is given in the following diagram. The

stacking connectors allow multiple switch assemblies to be seamlessly stacked.

8 x 10BaseT

Quad Quad

PHY PHY

8 x 10BaseT

Quad Quad

PHY PHY

10/100B aseT

1 0 /1 0 0

PHY

ELAN 8x10

8x10BaseT

P M 3350

ELAN 8x10

8x10BaseT

P M 3350

ELAN 1x100

1 x 1 0 /1 0 0

BaseT

P M 3351

ELAN 8x10

8x10BaseT

P M 3350

P C I B ackplane

ELAN 8x10

8 x 10BaseT

P M 3350

ELAN 1x100

1 x 1 0 /1 0 0

BaseT

P M 3351

Quad Quad

PHY PHY

8 x 10BaseT

Quad Quad

PHY PHY

8 x 10BaseT

1 0 /1 0 0

PHY

10/100B aseT

Expandable 10/100 Mbit/s Ethernet Switch

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 9

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