SI552 Datasheet, PDF (1/8 Pages) Silicon Laboratories – DUAL FREQUENCY VCXO (10 MHZ TO 1.4 GHZ)

Si552
PRELIMINARY DATA SHEET
DUAL FREQUENCY VCXO (10 MHZ TO 1.4 GHZ)
Features
„ Available with any-rate output
„ 3x better frequency stability than
frequencies from 10 to 945 MHz and SAW-based oscillators
selected frequencies to 1.4 GHz
„ 3rd generation DSPLL^® with
„ Two selectable output frequencies
superior jitter performance
„ Industry-standard 7x5 mm package _{„ Internal fixed crystal frequency}
„ Available CMOS, LVPECL, LVDS &
ensures high reliability and low
CML outputs
aging
„ Lead-free/RoHS-compliant
Applications
„ SONET / SDH
„ xDSL
„ 10 GbE LAN / WAN
Description
„ Low jitter clock generation
„ Optical Modules
„ Test and Measurement
The Si552 dual frequency VCXO utilizes Silicon Laboratories advanced
DSPLL^® circuitry to provide a very low jitter clock for all output frequencies.
The Si552 is available with any-rate output frequency from 10 to 945 MHz
and selected frequencies to 1400 MHz. Unlike traditional VCXO’s where a
different crystal is required for each output frequency, the Si552 uses one
fixed crystal frequency to provide a wide range of output frequencies. This
IC based approach allows the crystal resonator to be optimized for superior
frequency stability and reliability. In addition, DSPLL clock synthesis
provides superior supply noise rejection, simplifying the task of generating
low jitter clocks in noisy environments often found in communication
systems. The Si552 IC based VCXO is factory configurable for a wide
variety of user specifications including frequency, supply voltage and output
format. Specific configurations are factory programmed into the Si552 at
time of shipment, thereby eliminating the long lead times associated with
custom oscillators.
Functional Block Diagram
VDD
CLK- CLK+
Si5602
Ordering Information:
See page 7.
Fixed
Frequency XO
Any-rate
10–1400 MHz
DSPLL™
Clock Synthesis
ADC
VC
FS
GND
Preliminary Rev. 0.2 8/05
Copyright © 2005 by Silicon Laboratories
Si552
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.