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Product Brief

PRS 64Gu

Packet Routing Switch

PB PRS 64Gu / v0.5 / 12-19-2003

2

Empowering Intelligent Networks

PRS C48 and PRS C192 Common

Switch Interface

To expedite the design of

chassis-based systems requiring a

high-speed interconnect across a

backplane or short cable distances,

AMCC offers the new PRS C48

Common Switch Interface.

The PRS 64Gu, like the

PRS Q-64G, uses 2.5-Gbps

high-speed serial links for

communication with line adapters

equipped with the PRS C48

(connected to a 4G/OC-48c NPU or

TM) or current PRS C192 Common

Switch Interface chip (connected to

a 10G/OC-192c NPU or TM).

High-speed serial (HSS) links

simplify the wiring and enable

highly compact 64/128-Gbps switch

board designs, which can result in

significant cost reductions

(backplane and line adapters). The

new PRS C48 provides a 32-bit

wide CSIX-L1 compliant interface to

a Network Processor or Traffic

Manager and, like the PRS C192,

enables a duplicated path with

redundant PRS 64Gu-based switch

planes.

Redundancy Support for High

Availability

To increase availability and meet

Service Providers and new high

demanding applications (24x7),

switch fabrics are often designed

with two redundant planes. If an

element in one plane fails, the other

plane can take over; the PRS 64Gu

supports this crucial capability.

Each switch element has a built-in

filtering mechanism for redundancy

control.

On the line adapter, the PRS C48 or

PRS C192 Common Switch

Interface chip provides a redundant

path with the switch planes,

enabling traffic load sharing and

switchover between the two switch

planes, including maintenance

switchover without packet loss.

Highly Efficient Multicast

Multicast with QoS is an

increasingly valued capability in

Internet applications. The

PRS 64Gu, like the other members

of the PRS family, provides a

built-in efficient multicast function,

easing the design of edge routers

and other devices that provide

these complex services. To enable

multicasting and maximize product

resources utilization, the switch

executes a scheme of store once

and transmit multiple times

(replication at sending). The

multicast packet is placed in shared

memory and the memory-location

index is stored in the output queues

corresponding to the target output

ports and associated priorities.

Enablement Tools for an

Expedited Time to Market

To help reduce development time

and cost, AMCC offers a reference

switch core design and software to

operate the switch subsystem

control layer. The reference design,

a 128-Gbps, 16-layer, 286mm x

151mm compact switch board

allowing six PCBs out of a standard

18"x 24" PCB panel, is well-suited

for a redundant 32-port OC-48c

multiservice switch or a layer-2 and

above design that supports up to

128 Gigabit Ethernet ports.

Reference platforms allowing

evaluation of PRS switch fabric plus

network processor solutions, board

design services, and board

manufacturing capabilities

complement the AMCC PRS

offering.

Specifications

PRS 64Gu

Supply voltage

1.8 V, 2.5 V

Power

13W to 19W @ 100% traffic

Maximum Junction Temperature

125°C

Package Size

32.5mm x 32.5mm

624-ball CBGA (1.27 mm balls pitch)