SM840002 Datasheet PDF - MICREL

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SM840002
MICREL

Part Number SM840002
Description Ultra-Low Jitter LVCMOS Clock Frequency Synthesizer
Page 9 Pages


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SM840002
ClockWorksDual 10-Gigabit/Gigabit
Ethernet 62.5MHz, 125MHz, or 156.25MHz,
Ultra-Low Jitter LVCMOS Clock Frequency
Synthesizer
General Description
The SM840002 is a dual 10-Gigabit Ethernet and Gigabit
Ethernet, 62.5MHz, 125MHz, or 156.25MHz LVCMOS
clock frequency synthesizer and a member of the
ClockWorksfamily of devices from Micrel. It provides a
low-noise timing solution for high-speed, high-accuracy
synthesis of clock signals. It includes a patented
RotaryWave® architecture that provides a very stable clock
with very-low noise.
Power supplies of either 2.5V or 3.3V are supported, with
superior jitter and phase-noise performance. The device
synthesizes a 62.5MHz, 125MHz, or 156.25MHz, low-
noise LVCMOS output pair for Ethernet applications. The
crystal reference frequency is 25MHz.
The SM840002 is an excellent replacement for IDT
FemtoClocks®, with improved waveform integrity, and jitter.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
Generates two LVCMOS outputs
Operating supply modes:
Core/Output
3.3V/3.3V, 2.5V/2.5V
Typical phase jitter @156.25MHz~64 fs
(1.875MHz 20MHz)
Crystal frequency: 25MHz
62.5MHz, 125MHz, or 156.25MHz output frequency
Output Skew: 12ps (maximum)
Phase Noise @ 156.25MHz:
1KHz:
126dBc/Hz
10KHz:
130dBc/Hz
100KHz: 126dBc/Hz
1MHz:
139dBc/Hz
10MHz:
165dBc/Hz
20MHz:
166/dBc/Hz
Temperature range: –40°C to +75°C
Green-, RoHS-, and PFOS-compliant
Available in 16-pin TSSOP
Applications
Gigabit Ethernet
10-Gigabit Ethernet
www.DataSheet4U.com
ClockWorks is a trademark of Micrel, Inc.
RotaryWave is a registered trademark of Multigig, Inc.
FemtoClocks is a registered trademark of IDT, 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
November 2010
M9999-110810-A
hbwhelp@micrel.com or (408) 955-1690

SM840002 datasheet pdf
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SM840002 pdf
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Related : Start with SM84000 Part Numbers by
SM840001 106.25MHz Ultra-Low Jitter Clock Synthesizer SM840001
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SM840002 Ultra-Low Jitter LVCMOS Clock Frequency Synthesizer SM840002
MICREL
SM840002 pdf

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