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SM840051KA 参数 Datasheet PDF下载

SM840051KA图片预览
型号: SM840051KA
PDF下载: 下载PDF文件 查看货源
内容描述: 万兆以太网超低抖动时钟合成器 [10 Gigabit Ethernet Ultra-Low Jitter Clock Synthesizer]
分类和应用: 晶体外围集成电路光电二极管以太网时钟
文件页数/大小: 10 页 / 292 K
品牌: MICREL [ MICREL SEMICONDUCTOR ]
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SM840051
10 Gigabit Ethernet Ultra-Low Jitter Clock
Synthesizer
General Description
The SM840051 clock synthesizer was designed for
Ethernet standards. The SM840051 is optimized for 77.76,
78.125, 80.56, 155.52, 156.25, and 161.13MHz, using a
crystal at 1/8th the output frequency. The SM840051
includes a unique power reduction methodology, along
with a patented RotaryWave™ architecture, that provides
a stable clock with very low noise for optimized
performance. This yields an overall improved Bit Error
Rate (BER) and improved waveform integrity.
Power supplies of either 3.3V or 2.5V are supported, with
superior jitter and phase noise performance. An FSEL pin
supports 4x or 8x multiplication of the crystal frequency.
The SM840051 provides ultra-low jitter, and consumes low
power.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
Generates a single LVCMOS/LVTTL output
Output Frequencies: 77.76, 78.125, 80.56, 155.52,
156.25, and 161.13MHz
RMS Phase Jitter at 156.25MHz( 1.875MHz-20MHz):
58fs (typical)
Integrated loop filter components
Operates with either a 3.3V or 2.5V supply
Power consumption is <77mA @ 3.3 V
Fundamental parallel resonant crystal
Crystal Frequencies: 20.141601MHz,19.53125MHz, and
19.44MHz
Industrial temperature range: –40°C to +75°C
Available in 8-pin TSSOP package
Applications
10 Gigabit Ethernet
SONET/SDH
____________________________________________________________________________
Block Diagram
RotaryWave is a 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
May 2010
M9999-050710-C
hbwhelp@micrel.com
or (408) 955-1690