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ZL30107

Description
GbE Line Card Synchronizer
File Size166KB,6 Pages
ManufacturerZarlink Semiconductor (Microsemi)
Websitehttp://www.zarlink.com/
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ZL30107 Overview

GbE Line Card Synchronizer

ZL30107
GbE Line Card Synchronizer
Shortform Data Sheet
March 2007
A full Data Sheet is available to qualified customers. To
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Ordering Information
ZL30107GGG
64 Pin CABGA
Trays
ZL30107GGG2 64 Pin CABGA*
Trays
*Pb Free Tin/Silver/Copper
-40
o
C to +85
o
C
Configurable to accept a 25 MHz input reference
Automatic entry into Asynchronous Holdover
mode when all input references fail
Input reference is manually selectable through the
serial (SPI) interface
Hitless input reference switching
Lock indicator pin
Input reference status monitors
Programmable loop bandwidth of 14 Hz, 28 Hz, or
890 Hz
Features
Single chip low cost solution for synchronizing an
Ethernet PHY to a standard telecom clock
Generates an IEEE 802.3 jitter compliant 25 MHz
Gigabit Ethernet output clock
Supports three modes of operation:
Asynchronous Freerun, Synchronous, and
Asynchronous Holdover
Defaults in Asynchronous Freerun mode
In Asynchronous Freerun mode, the DPLL
generates an output clock with a frequency
accuracy equal to frequency accuracy of the
external crystal oscillator (XO) or a low cost
crystal (XTAL)
In Synchronous mode, the DPLL automatically
synchronizes to one of a pre-defined set of
frequencies including 2 kHz, 8 kHz, 64 kHz,
1.544 MHz, 2.048 MHz, 6.48 MHz, 8.192 MHz,
16.384 MHz, 19.44 MHz, 38.88 MHz, 77.76 MHz.
Applications
Ethernet Line Cards Supporting Synchronous
Transmission
X1/CLK X2
LOCK
REF0
REF1
REF2
DPLL
APLL
CLK
uP I/F
Figure 1 - Block Diagram
1
Zarlink Semiconductor Inc.
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright 2007, Zarlink Semiconductor Inc. All Rights Reserved.

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