SM802121 查看數據表（PDF） - Micrel

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SM802121

ClockWorks™ 10GbE (156.25MHz), Ultra-Low Jitter, LVPECL Frequency Synthesizer

Micrel 

SM802121

ClockWorks 10GbE

(156.25MHz), Ultra-Low Jitter, LVPECL

Frequency Synthesizer

General Description

The SM802121 is a member of the ClockWorks family of

devices from Micrel and provides an extremely low-noise

timing solution for 10GbE Ethernet clock signals. It is

based upon a unique patented RotaryWave® architecture

that provides very-low phase noise.

The device operates from a 2.5V or 3.3V power supply

and synthesizes an LVPECL output clock at 156.25MHz.

The SM802121 accepts a 25MHz crystal or LVCMOS

reference clock.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Features

 Generates one LVPECL clock outputs at 156.25MHz

 2.5V or 3.3V operating range

 Typical phase jitter @ 156.25MHz

(1.875MHz to 20MHz): 110fs

 Industrial temperature range

 Green, RoHS-, and PFOS- compliant

 Available in 24-pin 4mm  4mm QFN package

Applications

 10 Gigabit Ethernet

Block Diagram

ClockWorks is a trademark of Micrel, Inc

RotaryWave is a registered trademark of Multigig, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

January 2012

M9999-011212-A

hbwhelp@micrel.com or (408) 955-1690

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