Rev. 1.1 6/18 Copyright © 2018 by Silicon Laboratories Si597
QUAD FREQUENCY VOLTAGE-CONTROLLED CRYSTAL
O
SCILLATOR (VCXO) 10 TO 810 MHZ
Features
Applications
Description
The Si597 quad frequency VCXO utilizes Silicon Laboratories’ advanced
DSPLL
®
circuitry to provide a low-jitter clock for all output frequencies. The
Si597 is available with one of four pin-selectable ouput frequencies from 10
to 810 MHz. Unlike traditional VCXOs, where a different crystal is required
for each output frequency, the Si597 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 supply noise rejection, simplifying
the task of generating low-jitter clocks in noisy environments. The Si597 IC-
based quad frequency VCXO is factory-configurable for a wide variety of
user specifications including frequencies, supply voltage, output format,
tuning slope, and absolute pull range (APR). Specific configurations are
factory programmed at time of shipment, thereby eliminating the long lead
times associated with custom oscillators.
Functional Block Diagram
Available with any-frequency
output from 10 to 810 MHz
4 selectable output frequencies
3rd generation DSPLL
®
with
superior jitter performance
Internal fixed fundamental mode
crystal frequency ensures high
reliability and low aging
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 range
SONET/SDH (OC-3/12/48)
Networking
SD/HD SDI/3G SDI video
OTN
Clock recovery and jitter cleanup PLLs
FPGA/ASIC clock generation
Any Frequency
10–810 MHz
DSPLL
Clock Synthesis
CLK+
CLK-
V
DD
Power Supply Filtering
Power Supply Filtering
OE
GND
Control
FS0
FS1
Fixed
Frequency
Oscillator
V
c
ADC
Ordering Information:
See page 8.
Pin Assignments:
See page 7.
(Top View)
1
2
3
6
5
4
V
C
GND
OE
V
DD
CLK+
CLK–
7
8
FS[1]
FS[0]
Si597
