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SM802105 데이터시트(PDF) 1 Page - Micrel Semiconductor |
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SM802105 데이터시트(HTML) 1 Page - Micrel Semiconductor |
1 / 11 page SM802105 ClockWorks ™ 10GbE (156.25MHz, 312.5MHz), Ultra-Low Jitter, LVPECL Frequency Synthesizer 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 M9999-042111-A hbwhelp@micrel.com or (408) 955-1690 General Description The SM802105 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 LVPECL output clocks at 156.25MHz or 312.5MHz. There are normally two clock outputs but one output can be achieved by powering down the second output with the OE pin. The SM802105 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 one or two LVPECL clock outputs at 156.25MHz or 312.5MHz • 2.5V or 3.3V operating range • Typical phase jitter @ 156.25MHz (1.875MHz to 20MHz): 110fs • Industrial temperature range • Green, RoHS, and PFOS compliant • Available in 24-pin 4mm × 4mm QFN package Applications • 10Gigabit Ethernet Block Diagram |
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