Preliminary Rev. 0.25 7/09

Copyright © 2009 by Silicon Laboratories

Si590/591

Si590/591

Features

Applications

Description

to provide a low jitter clock at high frequencies. The Si590/591 is available

with any-rate output frequency from 10 to 525 MHz. Unlike a traditional XO,

where a unique crystal is required for each output frequency, the Si590/591

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

Si590/591 IC based XO is factory configurable for a wide variety of user

specifications including frequency, supply voltage, output format, and

temperature stability. Specific configurations are factory programmed at time

of shipment, thereby eliminating long lead times associated with custom

oscillators.

Functional Block Diagram

frequencies from 10 MHz to 525 MHz

jitter performance: 1 ps max jitter

based oscillators

ensures high reliability

LVDS, and CML outputs

package and pinout

temperature range

Fixed

Frequency

XO

Any-rate

10–525 MHz

DSPLL

®

Clock

Synthesis

CLK+

CLK–

GND

OE

17 k *

17 k *

*Note: Output Enable High/Low Options Available – See Ordering Information





Ordering Information:

See page 6.

Pin Assignments:

See page 5.

(Top View)

Si5602

1

2

3

6

5

4

GND

OE

CLK+

CLK–

NC

1

2

3

6

5

4

GND

NC

CLK

NC

OE

1

2

3

6

5

4

GND

NC

CLK+

CLK–

OE

Si590 (LVDS/LVPECL/CML)

Si590 (CMOS)

Si591 (LVDS/LVPECL/CML)