SFI-4.1

Brian Von Herzen, Ph.D.Xilinx Consultant, www.FPGA.com

OIF Electrical Interfaces

What are the OIF Electrical Interfaces?• SPI-5• SFI-5• SPI-4.2• SPI-4.1• SFI-4• SPI-3

SFI-4 SFI-4 (OC-192 SERDES-Framer Interface) OIF-PLL-

02.0 Proposal for a common electrical interface between SONET framer and serializer/deserializer parts for OC-192 interfaces)

System Packet Interface Level 5 (SPI-5): OC-768 System Interface forPhysical and Link Layer Devices

SPI-5 connects Physical to Link Layer Devices• Fabric interface chips (FIC)• Traffic managers• Network processing element (NPE’s)

SPI-5 Signals

The SPI-5 interface uses clock forwarding between • PHY• Link Layer Devices• Up to 3.125 Gbps• 16 lanes• 50 gigabits per sec• OC-768 with 25% overspeed

SFI-5

SERDES Framer Interface Level 5 (SFI-5): Implementation Agreement for 40Gb/s

Interface for Physical Layer Devices

SPI-4.2

System Packet Interface Level 4 (SPI-4) Phase 2: OC-192 System Interface for Physical and Link Layer Devices

SPI-4.2 Interface for Physical and Link Layer Devices

Uses 16 lanes at 622 Mbps or faster

SPI-4.1

System Physical Interface Level 4 (SPI-4) Phase 1:

A System Interface for Interconnection Between:• Physical and Link Layer,• Peer-to-Peer Entities Operating at 10 Gbps (OC-192).

64 Data Signals at 200 MHz

SPI-3

System Packet Interface Level 3 (SPI-3): OC-48 System Interface for Physical and Link Layer Devices

OIF Electrical Standards Benefits

Enables “Best-In-Class” selection of devices that interoperate• SERDES• FEC• Framers• Traffic Management• Fabric Interfaces

System vendors can choose their favorite feature sets and mix and match components as needed

OIF Electrical Standards Benefits (continued)

With interoperable standards, vendors can• Mix and Match “best of breed” components• Minimize the engineering to connect components• Reduce time to market• Enable customization using programmable logic

for key components

System Design Example

A systems vendor wanting to build an OC-768 switch with OIF standards can select:• A customized traffic manager from FPGA Vendor

X• A framer from ASSP vendor Y• A SERDES module from Optical Vendor Z

Optical Vendor Z

ASSP Vendor Y

FPGA Vendor X

OIF Electrical Standards Silicon Solutions

A variety of Silicon implementation solutions are available, including:

ASSP + FPGA ASIC System vendors do not get locked in to a

proprietary solution OIF-compliant chips interoperate effectively to

enable “best of breed” system solutions