VSC8486 查看數據表（PDF） - Vitesse Semiconductor
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VSC8486 Datasheet PDF : 2 Pages
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VSC8486
10 Gbps XAUI or XGMII to XFI LAN/WAN Transceiver
GENERAL DESCRIPTION:
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
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.
APPLICATION DIAGRAM: TRAFFIC-SHAPING/SECURITY APPLIANCE
XFP
LAN
VSC7978
TIA
VSC7980
VCSEL Driver
VSC8239
Dual
CDR
XFP
VSC8486
XAUI
Bypass
(XGMII)
WAN
VSC7978
TIA
VSC7982
EML Driver
VSC8239
Dual
CDR
VSC8486
XAUI
ASIC
APPLICATION DIAGRAM: 10 GIGABIT ETHERNET OVER SONET LINE CARD
XFP
LAN
VSC7978
TIA
VSC7980
VCSEL Driver
VSC8239
Dual
CDR
VSC8486
LAN/WAN
PHY
Meigs IIe
VSC7323
MAC
VSC9138
EoS
VCAT/LCAS
GFP
XAUI
SPI-4
TFI-5
Switch
Card
Trademarks TM
Vitesse, ASIC-Friendly, FibreTimer, TimeStream, Snoop Loop, Super FEC, FOCUSConnect, Meigs-II, Meigs-IIe, Lansing, Campbell-I, Barrington,
PaceMaker, HOVCAT48, HOVCAT48e, HOVCAT192, HOVCAT192e, Micro PHY, FOCUS32, FOCUS16, IQ2200, NexSAS, VersaCAT, GigaStream, HawX,
SparX, StaX, VstaX, SimpliPHY,VeriPHY, ActiPHY, XFP PRO, SFP PRO, Smart-LINK, OctalMAC, EQ Technology are trademarks in the United States and/or
other jurisdictions of Vitesse Semiconductor Corporation. All other trademarks or registered trademarks mentioned herein are the property of their respective
holders.
Copyright © 2006–2007
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
Vitesse for its use. Furthermore, the information contained herein does not convey to the purchaser of microelectronic devices any license under the patent
right of any manufacturer.
741 Calle Plano
Camarillo, CA 93012, USA
Tel: +1 805.388.3700
Fax: +1 805.987.5896
www.vitesse.com
sales@vitesse.com
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