Programmable I2C XO

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Lead Time 35 weeks
Unit Price:$6.95
Minumum Qty: 50
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Product Information

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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.

Symmetry Electronics is an authorized Silicon Labs distributor.


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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 5 x 7 and 3.2 x 5 mm packages
40 to 85 oC operation

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