SM802124 データシートの表示（PDF） - Micrel

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SM802124

ClockWorks™ DUAL 125MHz Ultra-Low Jitter, CMOS Frequency Synthesizer

Micrel 

SM802124

ClockWorks™ DUAL 125MHz

Ultra-Low Jitter, CMOS

Frequency Synthesizer

General Description

The SM802124 is a member of the ClockWorks™ family of

devices from Micrel and provides an extremely low-noise

timing solution for Ethernet clock signals. It is based upon

a unique patented RotaryWave® architecture that provides

very-low phase noise.

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

and synthesizes two CMOS output clocks at 125MHz from

a 15MHz LVCMOS reference clock.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

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Features

• Generates two LVCMOS clock outputs at 125MHz

• 2.5V or 3.3V operating range

• Typical rms phase jitter @ 125MHz

1.875MHz to 20MHz : 85fs

(Input source dependent)

• Industrial temperature range (–40°C to +85°C)

• Green, RoHS, and PFOS compliant

• Available in 24-pin 4mm × 4mm QFN package

Applications

• 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

September 2011

M9999-101311-B

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

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