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.

Si552

Features

Applications

Description

The Si552 dual frequency VCXO utilizes Silicon Laboratories advanced

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

Available with any-rate output

frequencies from 10 to 945 MHz and

selected frequencies to 1.4 GHz

Two selectable output frequencies

Industry-standard 7x5 mm package

Available CMOS, LVPECL, LVDS &

CML outputs

3x better frequency stability than

SAW-based oscillators

superior jitter performance

Internal fixed crystal frequency

ensures high reliability and low

aging

Lead-free/RoHS-compliant

SONET / SDH

xDSL

10 GbE LAN / WAN

Low jitter clock generation

Optical Modules

Test and Measurement

Fixed

Frequency XO

Any-rate

10–1400 MHz

DSPLL™

Clock Synthesis

CLK+

CLK-

GND

FS

ADC

Ordering Information:

See page 7.

Si5602