BCM5680 - Broadcom - Datasheet.Company

PRODUCT

Brief

BCM5680

BCM5680 8-PORT GIGABIT SWITCH ON A CHIP

•Represents the highest level of silicon integration

achieved for a complete eight-port gigabit switch,

integrating the switch fabric, MACs, address tables

and packet buffering functions.

•The highly programmable filter engine (FFP)

supports wire-speed pack-by-packet filtering and

classification, making the BCM5680 the ideal choice

for sophisticated switching applications.

•Supports a wide range of choices in user management

costs, featuring both an I2C and a 33/66 MHz PCI

interface.

•Supports four levels of CoS; maps to 802.1p priority

levels.

•Provides advanced packet flow control with HOL

prevention, backpressure support, and packet rate

control (802.3x).

•At 3 µsec, the BCM5680 provides the world’s lowest

latency for an eight-port gigabit switch.

•The BCM5680 seamlessly integrates with the

BCM5600 (24 Fast Ethernet plus 2 Gigabit Ethernet

ports), the BCM5602 and other BCM5680s to provide

high levels of flexibility in network system designs.

SUMMARY OF BENEFITS

•Switch fabric to deliver 12-Mpps switching

performance, providing line rate throughput

independent of protocol layer processed

•Layer 2 through 7 filtering and ContentAware™packet

classification, at full line rate on all ports

•Integrated buffer memory

•Configurable to be static, dynamically allocated, or both

•Highly efficient data memory packing

•Eight 10/100/1000 Ethernet MACs

•Gigabit stacking support for higher density system

requirements

•IEEE 802.1 Support

•Q => Support for VLAN

•D => Support for Spanning Tree

•p => Support for traffic classification

•8K MAC and 2K IP address tables on chip

•Flexible link aggregation on any port

•Port mirroring support

•Low-power 3.3/2.5V operation

•400-pin TBGA package

BCM5680 FEATURES

Non-Blocking 8-Port Multi-Layer Gigabit Switch

L2-L7

ContentAwareTM Layer 3 IP

CMIC

BCM5404

Phy or

Fiber Xcvr

BCM5404

Phy or

Fiber Xcvr

GMII / TBI

CPU / IF

10/100/1000 GMAC

PCI/Serial CPU Interface

Non-Blocking

Switch Fabric

512 KB

Packet Buffer

L2/L3/L4=

ARL Tables

4 CoS Queues

The Broadcom BCM5680 represents the highest level of cost-

reduction and integration available for the Gigabit Ethernet

market. A Broadcom-based eight-port gigabit switch reduces

today’s costs by as much as 50% over competing solutions.

The PCI interface provides a high-speed, flexible mechanism

for network system management. Its ability to run either

33 MHz or 66 MHz gives users the flexibility to choose

between bandwidth and cost when designing a managed

solution. Integrated features such as Scatter/Gather DMA

supports advanced management software requirements.

Alternatively, an I2C compatible interface is supported.

The 10/100/1000 megabit interface enables users to connect at

any speed required on a given port. This triple-speed interface

automatically negotiates to support legacy devices alongside

newer, high-bandwidth devices, all in the same switch.

The interface permits the use of a BCM8002 SerDes for fiber

optics, a quad BCM5404 Gigabit PHY for 1000TX, or a

standard 100TX PHY.

The integrated 512 KB data packet memory eliminates the

need for external data packet storage. The memory

organization and structure can be optimized to provide a

minimum fixed allocation of buffer space per port and a

dynamic pool size, to absorb any bursty traffic requirements.

The integrated L2, L3, and filtering tables deliver industry-

leading switching performance. The BCM5680 achieves full

wirespeed layer 2 and layer 3 switching on all ports.

Additionally, its innovative architecture supports wirespeed

layer 2 through layer 7 filtering, utilizing a 35 Gbps internal

high speed bus.

Higher density configurations are easily achieved through

link-aggregating multiple ports or stacking ports from box to

box. Stand-alone configurations can easily achieve 24-Gigabit

ports using only five devices with no external memory

required.

BCM5680 OVERVIEW

For more information please contact us at:

Phone: 949-450-8700, FAX: 949-450-8710

Email: info@broadcom.com

Visit our web site at: www.broadcom.com

5680-PB02-R-4.23.01

Broadcom®and the pulse logo are registered trademarks of Broadcom Corporation

and/or its subsidiaries in the United States and certain other countries.

ContentAware is a trademark of Broadcom Corporation.

BROADCOM CORPORATION

16215 Alton Parkway, P.O. Box 57013

Irvine, California 92619-7013