SM802109 Datasheet, PDF (1/11 Pages) Micrel Semiconductor – ClockWorks™ PCI-e Quad 100MHz Ultra-Low Jitter, HCSL Frequency Synthesizer

SM802109
ClockWorks™ PCI-e Quad 100MHz
Ultra-Low Jitter, HCSL
Frequency Synthesizer
General Description
The SM802109 is a member of the ClockWorks™ family of
devices from Micrel and provides an extremely low-noise
timing solution for PCI-Express clock signals. It is based
on 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 four HCSL output clocks at 100MHz. The
SM802109 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 four HCSL clock outputs at 100MHz
• 2.5V or 3.3V operating range
• Typical phase jitter @ 100MHz
(1.875MHz to 20MHz): 105fs
• Industrial temperature range (–40°C to +85°C)
• Green, RoHS, and PFOS compliant
• Available in 24-pin 4mm × 4mm QFN package
Applications
• PCI-Express
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 [phone] • fax + 1 [phone] • http://www.micrel.com
September 2011
M9999-092911-B
[e-mail] or [phone]