sm840004-11 Micrel Semiconductor, sm840004-11 Datasheet - Page 5

• Manufacturer Part Number: sm840004-11
• Description: 62.5/125mhz Gigabit Ethernet, 4 Output, Ultra-low Jitter Clock Synthesizer
• Manufacturer: Micrel Semiconductor

Micrel, Inc.
Crystal Characteristics
Functional Description
The SM840004-11 provides a high performance and
high accuracy solution for a precision clock source at
either 62.5MHz or 125MHz derived from a low cost
25MHz Xtal. Four synchronous low skew 12mA capable
LVCMOS outputs are provided with tri state controlled
via an external pin (OE).
The design of the SM840004-11 consumes very low
power in the PLL due to a patented technology in the
VCO and the associated dividers. The VCO range is
~3.2GHz to 3.5GHz providing high resolution and easy
July 2010
Parameter
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitor
Drive Level
Fundamental Parallel Resonant
Min
5
integer divide ratios. Output divider ratios are fixed at
either ÷26 or ÷52 via the F_SEL pin, and the feedback
divider is fixed at ÷130.
improved and provides tight control and stability on this
critical
specifications for Duty Cycle, Jitter, Phase Noise, Power
Consumption, and noise sensitivity. Additionally, the
SM840004-11 will operate at either 3.3V or 2.5V
supplies.
Typ
25
specification.
Max
50
7
1
[e-mail]
Units
MHz
mW
pF
Ω
This
Duty Cycle is inherently
provides
or [phone]
M9999-070110-A
SM840004-11
improved