Trademarks

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other jurisdictions of Vitesse Semiconductor Corporation. All other trademarks or registered trademarks mentioned herein are the property of their respective

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Vitesse Semiconductor Corporation (“Vitesse”) retains the right to make changes to its products or specifications to improve performance, reliability or

manufacturability. All information in this document, including descriptions of features, functions, performance, technical specifications and availability, is

subject to change without notice at any time. While the information furnished herein is held to be accurate and reliable, no responsibility will be assumed by

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VSC8486

VSC8486

VSC8486

VSC8486

LAN

VSC8486

LAN/WAN

PHY

Meigs IIe

VSC7323

MAC

XAUI

SPI-4

Switch

Card

TFI-5

VSC9138

EoS

VCAT/LCAS

GFP

XFP

VSC8239

Dual

CDR

VSC7980

VCSEL Driver

VSC7978

TIA

LAN

XFP

VSC8239

Dual

CDR

VSC7980

VCSEL Driver

VSC7978

TIA

XFP

VSC8239

Dual

CDR

XAUI

XAUI

Bypass

(XGMII)

ASIC

VSC7982

EML Driver

VSC7978

TIA

WAN

GENERAL DESCRIPTION:

APPLICA TION DIAGRAM: TRAFFIC-SHAPING/SECURITY APPLIANCE

APPLICA TION DIAGRAM: 10 GIGABIT ETHERNET OVER SONET LINE CARD

10 Gbps XAUI or XGMII to XFI LAN/WAN Transceiver

The VSC8486 is a LAN/WAN XAUI or XGMII

transceiver that converts 3 Gbps XAUI data to a

10 Gbps serial stream. At just 750 mW, the VSC8486

is ideal for applications requiring low power. The

device is also equipped with an additional full-rate

data port that can be utilized for bypass monitoring

or channel monitoring applications. The device

meets all specifications for 10 Gigabit Ethernet (GbE) Layer-1 processing,

as defined in IEEE 802.3ae.

The VSC8486 offers exceptional 10 Gbps mixed-signal performance with

a data output that features programmable pre-emphasis to enable longer

traces of copper. The VSC8486 high-speed serial I/O supports 9.9 Gbps,

10.3 Gbps, and 10.5 Gbps, as defined by IEEE 802.3ae and T11 10 GFC,

and is fully compliant with the SONET jitter specification defined by

Bellcore GR253.

There are four main data processing blocks in the device: XGXS, PCS,

WIS, and PMA. The 10 GbE extender sublayer (XGXS) accepts 8b/10b

data running at 3.125 Gbps and decodes it for transmission to the physical

coding sublayer (PCS). The XGXS is capable of deskewing more than

60 bit times between lanes. The PCS receives data from the XGXS at

10 Gbps and encodes data according to the 64b/66b algorithm described

in IEEE 802.3ae clause 49.

The PCS features an optional extended mode (E-PCS) that also runs at

the 64b/66b rate. This extended mode uses an alternative framing

algorithm that adds forward error correction (FEC) to provide ~2.5 dB of

net electrical coding gain. The E-PCS is available for LAN mode but not

WAN mode.

The PCS outputs data to the WAN interface sublayer (WIS). (This mode is

bypassed in LAN mode.) The WIS optionally takes data from the PCS at

9.953 Gbps and frames data in a SONET STS-192c frame, as described

in IEEE 802.3ae clause 50. Additionally, the WIS block contains extended

SONET and SDH processing capabilities that allow system operators to

leverage valuable performance monitoring data. Finally, data is delivered

to the physical media attachment (PMA) block. The PMA multiplexes the

internal parallel data bus into a 10 Gbps data stream.

The 10 Gbps to XAUI data channel performs the operations described

above in reverse. Notable features in this path are a SONET-compliant

LOS detector and a 10 Gbps receiver that is fully compliant with XFI

specifications, including stressed eye criteria.

The device operates using a 1.2 V supply dissipating only 700 mW in LAN

mode and 750 mW in WAN mode. The VSC8486 is available in standard

and lead(Pb)-free (second-level interconnect only) packages, measuring

17 mm × 17 mm with 256 pins and 1.0 mm pin pitch.