Preliminary Rev. 0.3 4/06

Copyright © 2006 by Silicon Laboratories

Si550

This information applies to a product under development. Its characteristics and specifications are subject to change without notice.

Si550

Features

Applications

Description

provide a low-jitter clock at high frequencies. The Si550 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 Si550 uses one fixed crystal to provide a wide

range of output frequencies. This IC based approach allows the crystal

resonator to provide exceptional 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

typically found in communication systems. The Si550 IC-based VCXO is

factory configurable for a wide variety of user specifications, including

frequency, supply voltage, output format, tuning slope, and temperature

stability. Specific configurations are factory programmed at time of shipment,

thereby eliminating long lead times associated with custom oscillators.

Functional Block Diagram

Available with any-rate output

frequencies from 10 MHz to

945 MHz and selected frequencies

to 1.4 GHz

superior jitter performance

3x better frequency stability than

SAW based oscillators

Internal fixed crystal frequency

ensures high reliability and low

aging

Available CMOS, LVPECL,

LVDS, & CML outputs

3.3, 2.5, and 1.8 V supply options

Industry-standard 5 x 7 mm

package and pinout

Lead-free/RoHS-compliant

SONET / SDH

xDSL

10 GbE LAN / WAN

Low-jitter clock generation

Optical modules

Clock and data recovery

Fixed

Frequency

XO

Any-rate

10-1400 MHz

Clock Synthesis

ADC

CLK+

CLK–

Vc

OE

GND

Ordering Information:

See page 8.

Pin Assignments:

See page 7.

(Top View)

Si5602

1

2

3

6

5

4

GND

OE

CLK+

CLK–