Si590/591
1 ps MAX JITTER CRYSTAL OSCILLATOR (XO)
(10 MHZ TO 525 MHZ)
Features
Si5602
Available with any-rate output
Available CMOS, LVPECL,
LVDS, and CML outputs
3.3, 2.5, and 1.8 V supply options
Industry-standard 5 x 7 mm
package and pinout
Pb-free/RoHS-compliant
–40 to +85 ºC operating
temperature range
frequencies from 10 MHz to 525 MHz
®
3rd generation DSPLL with superior
jitter performance: 1 ps max jitter
Better frequency stability than SAW-
based oscillators
Internal fundamental mode crystal
ensures high reliability
Ordering Information:
Applications
See page 6.
SONET/SDH (OC-3/12/48)
Networking
SD/HD SDI/3G SDI video
Test and measurement
Storage
FPGA/ASIC clock generation
Pin Assignments:
See page 5.
Description
®
(Top View)
The Si590/591 XO utilizes Silicon Laboratories’ advanced DSPLL circuitry
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.
VDD
1
2
3
6
5
4
NC
OE
CLK–
CLK+
GND
Si590 (LVDS/LVPECL/CML)
VDD
1
2
3
6
5
4
OE
NC
Functional Block Diagram
NC
VDD
CLK– CLK+
GND
CLK
Si590 (CMOS)
17 k*
VDD
1
2
3
6
5
4
Any-rate
10–525 MHz
DSPLL®
Clock
Synthesis
OE
NC
Fixed
Frequency
XO
OE
CLK–
CLK+
GND
17 k*
Si591 (LVDS/LVPECL/CML)
*Note: Output Enable High/Low Options Available – See Ordering Information
GND
Preliminary Rev. 0.25 7/09
Copyright © 2009 by Silicon Laboratories
Si590/591