Si590/591
1 ps MAX JITTER CRYSTAL OSCILLATOR (XO)
(10 MHZ TO 810 MHZ)
Features
Si5602
Available with any-frequency output
frequencies from 10 to 810 MHz
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
®
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 7.
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 6.
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 supports any
frequency from 10 to 810 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
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*
Any-rate
10–810 MHz
DSPLL®
Clock
Synthesis
Fixed
Frequency
XO
VDD
1
2
3
6
5
4
OE
NC
OE
CLK–
CLK+
17 k*
GND
Si591 (LVDS/LVPECL/CML)
*Note: Output Enable High/Low Options Available – See Ordering Information
GND
Rev. 1.0 8/11
Copyright © 2011 by Silicon Laboratories
Si590/591