SiTime, Silicon MEMS Oscillators and Clock Generators

SiT9122: Ultra Performance, High Frequency Differential Oscillator

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ace-award-2012-finalistThe 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 best-in-class RMS phase jitter of 0.6 ps. Unlike quartz or SAW based traditional oscillators, the SiT9122 is available in any combination of voltage (2.5V to 3.3V), frequency stability (±10, ±20, ±25, and ±50 PPM) and package (3225, 5032, 7050) options.



Frequency Range (MHz) 220 to 625
Frequency Stability (PPM) ±10, ±20, ±25, ±50
RMS Integrated Phase Jitter (12kHz to 20MHz) 0.6 ps
Temp Range (°C) -20 to +70, -40 to +85
Supply Voltage (V) 2.5, 3.3, 2.25V to 3.63V continuous supply voltage
Package LxWxH (mm) 3.2 x 2.5 x 0.75, 5.0 x 3.2 x 0.75, 7.0 x 5.0 x 0.9
Status Production
  • Synchronous Ethernet
  • 10G Ethernet
  • PCI-Express
  • System Clocking

Features Benefits
  • 0.6 ps integrated RMS phase jitter (12 kHz to 20 MHz)
  • Excellent jitter margin for the most stringent applications such as SONET
  • Excellent frequency stability, as low as ±10 PPM
  • Better timing margin that enhances system stability and robustness
  • Extensive programmability
  • Frequency from 220 to 625 MHz
  • LVPECL and LVDS output signaling types
  • Supply voltage of 2.5V and 3.3V
  • Frequency stability from ±10 PPM to ±50 PPM
  • Customized specifications for optimal system performance
  • 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
  • 3-5 weeks lead time
    • Any frequency
    • Any voltage
    • Any package
  • Reduce inventory overhead
  • Mitigate shortage risks


Measured Performance Reports on SiT9122

The following 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

icon 250 MHz LVDS (500.76 kB)
icon 312.5 MHz LVPECL (478.11 kB)
icon 250 MHz LVPECL (469.79 kB)
icon 311 MHz LVPECL (256.74 kB)
icon 311 MHz LVPECL (256.74 kB) icon 622.08 MHz LVDS (652.94 kB)
icon 312.5 MHz LVDS (487.42 kB)
icon 622.08 MHz LVPECL (219.57 kB)


Subject to change without notice


Frequencies Not Supported

Range 1: From 251.000001 MHz to 263.999999 MHz
Range 2: From 314.000001 MHz to 422.999999 MHz
Range 3: From 502.000001 MHz to 527.999999 MHz


SiT9122 2.5V LVDS
IBIS icon SiT9122_LVDS_2p5_hf
IBIS icon SiT9122_LVDS_2p5_lf
IBIS icon SiT9122_LVPECL_2p5_hf
IBIS icon SiT9122_LVPECL_2p5_lf
IBIS icon SiT9122_LVDS_3p3_hf
IBIS icon SiT9122_LVDS_3p3_lf
IBIS icon SiT9122_LVPECL_3p3_hf
IBIS icon SiT9122_LVPECL_3p3_lf