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The SiT9122 is a highly flexible, high-frequency, programmable differential oscillator that supports LVPECL and LVDS output signaling types. This differential oscillator covers any frequency between 220 to 625 MHz, with RMS phase jitter of 0.6 ps (typ.). Unlike quartz or SAW based traditional oscillators, the SiT9122 is available in any combination of voltage (2.5 V to 3.3 V), frequency stability (±10, ±20, ±25, and ±50 ppm) and package (3225, 5032, 7050) options.


220 to 625 MHz
Frequency Stability (ppm)
±10, ±20, ±25, ±50
Operating Temperature Range (°C)
-20 to +70, -40 to +85
Oscillator Type
Output type
Package Type (mm²)
3.2x2.5, 5.0x3.2, 7.0x5.0
Phase Jitter (RMS)
0.6 ps
Field programmable
Voltage Supply (V)
2.5, 3.3, 2.25 to 3.63
  • 1Gb to 10Gb Ethernet
  • Optical Modules
  • PCIe
  • FPGA
  • Fibre channel
  • System clocking
  • Test and Measurement


Features & Benefits

0.6 ps (typ.) integrated RMS phase jitter (12 kHz to 20 MHz)

  • Excellent jitter margin for the most stringent applications such as 1 to 10GbE

Excellent frequency stability, as low as ±10 ppm

  • Better timing margin that enhances system stability and robustness
  • Extensive programmability
  • Fixed frequency between 25 to 212.5 MHz
  • LVPECL and LVDS output signaling types
  • Supply voltage of 2.5 V and 3.3 V
  • Frequency stability from ±10 ppm and ±50 ppm
  • Customized specifications for optimal system performance
  • Cost-effective
  • Easy availability of any device specification within the operating range

Three industry-standard packages

  • 100% drop-in replacement for quartz, SAW and overtone oscillators without any design changes
  • 4 to 6 weeks lead time
  • Reduce inventory overhead
  • Mitigate shortage risks

Performance Reports

The following PDF reports contain details of actual measurements on SiTime devices at the frequencies mentioned below and are intended to supplement the datasheet. Measurement conditions and equipment are specified in the individual files. If you desire a more detailed report than the ones provided below, please contact your local SiTime sales representative or email

Quality Documents

Additional Resources