SM802123 Datasheet, PDF (1/12 Pages) Micrel Semiconductor – ClockWorks™ 125MHz/25MHz Ultra-Low Jitter, LVCMOS Frequency Synthesizer

SM802123
ClockWorks™ 125MHz/25MHz
Ultra-Low Jitter, LVCMOS
Frequency Synthesizer
General Description
The SM802123 is a member of the ClockWorks™ family of
devices from Micrel and provides an extremely low-noise
timing solution. 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 16 LVCMOS output clocks, eight at
125MHz and eight at 25MHz. The SM802123 accepts a
25MHz LVCMOS reference input.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
• Generates eight LVCMOS output clocks at 125MHz and
eight LVCMOS output clocks at 25MHz
• 2.5V or 3.3V operating range
• Typical phase jitter @ 125MHz
(1.875MHz to 20MHz): 115fs
• Industrial temperature range
• Green, RoHS, and PFOS compliant
• Available in 44-pin 7mm × 7mm QFN package
Applications
• Gigabit Ethernet – (GbE)
________________________________________________________________________________________________
Block Diagram Top Level Schematic
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
January 2012
M9999-012312-A
[e-mail] or [phone]