SI516 Datasheet, PDF (1/22 Pages) Silicon Laboratories – DUAL FREQUENCY VOLTAGE-CONTROLLED

Si516
DUAL FREQUENCY VOLTAGE-CONTROLLED
CRYSTAL OSCILLATOR (VCXO) 100 kHZ TO 250 MHZ
Features
 Supports any frequency from
 Available CMOS, LVPECL,
100 kHz to 250 MHz
LVDS, and HCSL outputs
 Two selectable output frequencies  Optional 1:2 CMOS fanout buffer
 Low-jitter operation
 3.3 and 2.5 V supply options
 Short lead times: <2 weeks
 Industry-standard 3.2 x 5.0 mm
 AT-cut fundamental mode crystal
and 5 x 7 mm package/pinouts
ensures high reliability/low aging  Pb-free/RoHS-compliant
 High power supply noise rejection  Selectable Kv (60, 90, 120,
 1% control voltage linearity
150 ppm/V)
Applications
 SONET/SDH/OTN
 PON
 Low Jitter PLLs
 xDSL
Description
 Broadcast video
 Telecom
 Switches/routers
 FPGA/ASIC clock generation
The Si516 dual frequency VCXO utilizes Silicon Laboratories' advanced PLL
technology to provide any frequency from 100 kHz to 250 MHz. Unlike a
traditional VCXO where a different crystal is required for each output
frequency, the Si516 uses one fixed crystal and Silicon Labs’ proprietary
synthesizer to generate any frequency across this range. This IC-based
approach allows the crystal resonator to provide enhanced reliability,
improved mechanical robustness, and excellent stability. In addition, this
solution provides superior control voltage linearity and supply noise
rejection, improving PLL stability and simplifying low jitter PLL design in
noisy environments. The Si516 is factory-configurable for a wide variety of
user specifications, including frequency, supply voltage, output format,
tuning slope and stability. Specific configurations are factory-programmed at
time of shipment, eliminating long lead times and non-recurring engineering
charges associated with custom frequency oscillators.
Functional Block Diagram
Si5602
Ordering Information:
See page 14.
Pin Assignments:
See page 12.
Vc ¹
FS ²
GND 3
6 VDD
5 NC
4 CLK
CMOS Dual VCXO
Vc ¹
6 VDD
FS ²
5 CLK–
GND 3
4 CLK+
LVPECL/LVDS/HCSL/Dual CMOS
Dual VCXO
Rev. 1.0 6/12
Copyright © 2012 by Silicon Laboratories
Si516