SM802111 データシートの表示（PDF） - Micrel
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SM802111 Datasheet PDF : 7 Pages
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SM802111
ClockWorks™ GbE Dual 125MHz
Ultra-Low Jitter, LVPECL
Frequency Synthesizer
General Description
The SM802111 is a member of the ClockWorks™ family of
devices from Micrel and provides an extremely low-noise
timing solution for Gigabit 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 LVPECL output clocks at 125MHz.
The SM802111 accepts a 15MHz LVCMOS reference
clock.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
• Generates two LVPECL clock outputs at 125MHz
• 2.5V or 3.3V operating range
• Typical phase jitter @ 125MHz
(1.875MHz to 20MHz): 85fs (typical) at 3.3V
• Industrial temperature range
• Green, RoHS, and PFOS compliant
• Available in 24-pin 4mm × 4mm QFN
Applications
• Gigabit Ethernet
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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
April 2011
M9999-041111-A
hbwhelp@micrel.com or (408) 955-1690
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