Si549

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The Si549 from Silicon Labs is a crystal oscillator that provides an ultra-low jitter, low phase noise clock at an output frequency from 0.2 to 1500 MHz. This crystal oscillator is user-programmable via simple I2C commands and has less than 1 ppb resolution with excellent power supply noise rejection due to on-chip power supply filtering. The XO has a phase jitter of only 95 fs (femtoseconds) for optical networking, 100G+ optical modules, coherent optics, broadband, data center, broadcast video, test and measurement and FPGA/ASIC clocking applications. It is available in a small, industry-standard 3.2 x 5 mm package.

Specific configurations are factory-programmed at the time of shipment, eliminating the long lead times associated with custom oscillators. Silicon Labs ships custom frequency samples 1-2 weeks after receipt of an order.

Product Specifications

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Product Details

  • Part Number
    Si549
  • Manufacturer
    Silicon Labs
  • Description
    Ultra Low Jitter I2C Programmable XO from 0.2 to 1500 MHz

General Parameters

  • Output Waveform
    LVPECL, LVDS, CML, HCSL, CMOS, Dual CMOS
  • Applications
    100G/200G/400G OTN, 3G-SDI/12G-SDI/24G-SDI broadcast video, 10G/40G/100G optical ethernet, Test & Measurement, FPGA/ASIC clocking
  • RoHS
    Yes
  • Dimension
    5 × 7 mm, 3.2 × 5 mm
  • Frequency
    0.2 to 1500 MHz
  • Supply Voltage
    1.8 to 3.3 V
  • Temperature Stability
    +/- 20 ppm
  • Package
    8-pin CLCC
  • Package Type
    Surface Mount
  • Current
    73 to 153 mA
  • Duty Cycle
    45 to 55 %
  • Fall Time
    0.5 to 1.5 ps
  • Jitter
    95 to 200 fs
  • Operating Temperature
    -40 to 85 Degree C
  • Phase Noise
    -161 to -92 dBc/Hz
  • Phase Noise 1 kHz
    -130 to -117 dBc/Hz
  • Phase Noise 1 MHz
    -149 to -130 dBC/Hz
  • Phase Noise 10 kHz
    -137 to -126 dBc/Hz
  • Phase Noise 100 kHz
    -143 to -130 dBc/Hz
  • Rise Time
    0.5 to 1.5 ps
  • Storage Temperature
    -55 to 125 Degree C

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