SI514 Datasheet, PDF (1/36 Pages) Silicon Laboratories – ANY-FREQUENCY IC PROGRAMMABLE XO

Si514
ANY-FREQUENCY I²C PROGRAMMABLE XO (100 kHZ TO 250 MHZ)
Features
 Programmable to any frequency  On-chip LDO for power supply
from 100 kHz to 250 MHz
noise filtering
 0.026 ppb frequency tuning
 3.3, 2.5, or 1.8 V operation
resolution
 Differential (LVPECL, LVDS,
 Glitch suppression on OE, power HCSL) or CMOS output options
on and frequency transitions
 Optional integrated 1:2 CMOS
 Low jitter operation
fanout buffer
 2- to 4-week lead times
 Industry standard 5 x 7 and
 Total stability includes 10-year
3.2 x 5 mm packages
aging
 –40 to 85 ^oC operation
 Comprehensive production test
coverage includes crystal ESR and
DLD
Applications
 All-digital PLLs
 DAC+ VCXO replacement
 SONET/SDH/OTN
 3G-SDI/HD-SDI/SDI
 Datacom
 Industrial automation
 FPGA/ASIC clock generation
 FPGA synchronization
Description
The Si514 user-programmable I²C XO utilizes Silicon Laboratories' 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
Silicon Labs’ proprietary DSPLL synthesizer to generate any frequency across this
range using simple I²C 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, I²C 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
Si5602
Ordering Information:
See page 28.
Pin Assignments:
See page 27.
SDA 1
SCL 2
GND 3
6 VDD
5 CLK–
4 CLK+
Rev. 1.0 5/12
Copyright © 2012 by Silicon Laboratories
Si514