Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
Rev. 1.2 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • August 12, 2021
Si514
ANY-FREQUENCY I
2
C PROGRAMMABLE XO (100 kHZ TO 250 MHZ)
Features
Applications
Description
The Si514 user-programmable I
2
C XO utilizes Skyworks Solutions' advanced PLL
technology to provide any frequency from 100 kHz to 250 MHz with programming
resolution of 0.026 parts per billion. The Si514 uses a single integrated crystal and
Skyworks Solutions ’ proprietary DSPLL synthesizer to generate any frequency
across this range using simple I
2
C commands. Ultra-fine tuning resolution replaces
DACs and VCXOs with an all-digital PLL solution that improves performance where
synchronization is necessary or in free-running reference clock applications. This
solution provides superior supply noise rejection, simplifying low jitter clock
generation in noisy environments. Crystal ESR and DLD are individually
production-tested to guarantee performance and enhance reliability.
The Si514 is factory-configurable for a wide variety of user specifications, including
startup frequency, I
2
C address, supply voltage, output format, 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
Programmable to any frequency
from 100 kHz to 250 MHz
0.026 ppb frequency tuning
resolution
Glitch suppression on OE, power
on and frequency transitions
Low jitter operation
2- to 4-week lead times
Total stability includes 10-year
aging
Comprehensive production test
coverage includes crystal ESR and
DLD
On-chip LDO for power supply
noise filtering
3.3, 2.5, or 1.8 V operation
Differential (LVPECL, LVDS,
HCSL) or CMOS output options
Optional integrated 1:2 CMOS
fanout buffer
Industry standard 5x7, 3.2x5, and
2.5x3.2 mm packages
–40 to 85
o
C operation
All-digital PLLs
DAC+ VCXO replacement
SONET/SDH/OTN
3G-SDI/HD-SDI/SDI
Datacom
Industrial automation
FPGA/ASIC clock generation
FPGA synchronization
Ordering Information:
See page 28.
Pin Assignments:
See page 27.
Si5602
5x7mm, 3.2x5mm 2.5x3.2mm
1
2
3
6
5
4GND
SCL
V
DD
CLK+
CLK–
SDA
