VSC8239 Просмотр технического описания (PDF) - Vitesse Semiconductor
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VSC8239 Datasheet PDF : 2 Pages
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VSC8239
9.953 Gbps to 11.3 Gbps Dual XFP Signal Conditioner
GENERAL DESCRIPTION:
The VSC8239 device is a dual 10 Gbps Clock-
and-Data-Recovery unit (CDR) designed for
use as a signal conditioner IC for XFP
modules. This 5 mm x 5 mm single chip
solution has advantages of cost, size, and
feature set over existing two chip solutions.
A two-wire serial interface provides versatile
control and alarm access.
Each CDR is dedicated to supporting the corresponding
transmit and receive path as specified in the XFP MSA
standard. The Receive (Rx) data path consists of a limiting
amplifier with offset correction and programmable
Equalization (EQ) function, followed by a Clock Recovery Unit
(CRU), Phase-Locked Loop (PLL), and a XFI compliant data
output driver. Rx Loss of Signal (LOS) and Rx Loss of Lock
(LOL) alarm signals are also supported to provide full
compliance to the XFP standard.
The Transmit (Tx) data path consists of a Variable Gain Amplifier
(VGA) with a programmable EQ function. The VGA and EQ are
digitally controlled through the Two-wire Serial Interface/SPI
interface and allow for application specific jitter generation
optimization. A PLL-based CRU drives the 50 ohms Tx data driver
with levels compatible with available laser driver IC’s. The Tx LOL
alarm signal is supported.
Leveraging off the integration of transmit and receive path, the
VSC8239 device provides diagnostics and line loopback modes that
enable advanced XFP module level features such as a Built In Self
Test (BIST) feature with programmable error detection capability. This
facilitates high volume module manufacturing and system level setup.
It has a continuously tunable operating range from 9.9 Gbps to 11.3
Gbps supporting OC-192 (9.953 Gbps), 10 GbE (10.3 Gbps), 10 Gbps
Fibre Channel (10.5 Gbps), OC192FEC (10.709 Gbps), 10 GbE + FEC
(11.05 Gbps), and 10 Gbps Fibre Channel + FEC (11.3 Gbps) data rates.
APPLICATIONS:
Fully compatible with the complete family of Vitesse XFP module
application products including 10 Gbps SERDES, Host ASIC family:
VSC8476, VSC8478, VSC8479, and 10 Gbps laser drivers and TIAs:
VSC7980, VSC7981, VSC7982, VSC7985, VSC7978, and VSC7979.
APPLICATION DIAGRAM:
Opt i c a l
Int er fac e
XFP Transceiver
VS C7 9 8 6 RO SA
P Pi nin
DDe et etec ctot r
VS C7 985
T IA
VS C7 9 7 8 /9
Pos t A m p
+ CDR
Las e r
VS C7982 /1/0
E M L/D M L/V CS E L
DDRRIVIEV RE R
V SC 8233
D ua l Signa l
CCoonn d it ion er
CDR+CU
EQ
uCC
VS C8234 D u al CDR w VC SEL Driver
XFI
Interface
H O S T A SSIIC
1100GGb
XC VR S
SFI4 -SO NET
VSC8 479
XAUI -10Gb Ee//FFCC
VSC 8476
XG MII-
10 Gb eE//FFCC
VSC 8478
Trademarks ™
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, 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 © 2005
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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