SM802128 查看數據表（PDF） - Micrel

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SM802128

ClockWorksΤΜ 10GbE Octal 156.25MHz, 312.5MHz, Ultra-Low Jitter, LVPECL Frequency Synthesizer

Micrel 

SM802128

ClockWorksΤΜ 10GbE Octal 156.25MHz,

312.5MHz, Ultra-Low Jitter, LVPECL

Frequency Synthesizer

General Description

Features

The SM802128 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 3.3V or 2.5V power supply

and synthesizes eight LVPECL output clocks at

156.25MHz or 312.5MHz. The SM802128 accepts a 25

MHz crystal or LVCMOS reference clock.

• Generates eight LVPECL clocks at 156.25MHz or

312.5MHz

• 2.5V or 3.3V operating range

• Typical phase jitter @ 156.25MHz

(1.875MHz to 20MHz): 110fs with crystal reference

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

• Green, RoHS, and PFOS compliant

• Available in 44-pin 7mm × 7mm QFN package

Data sheet and support documentation can be found on

Micrel’s web site at: www.micrel.com.

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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

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

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