SiTime, Silicon MEMS Oscillators and Clock Generators

SiT3922: Digitally Controlled Differential Oscillator (DCXO)

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The SiT3922 is a highly flexible, high frequency Digitally Controlled Differential Oscillator (DCXO)·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 <0.5 ps. This oscillator provides an extremely wide pull range up to ±1600 PPM with superior pull range linearity of 0.1% which is 100 times·better than quartz crystal VCXOs, thereby simplifying PLL and clock synchronization design. The SiT3922 uses a 1-wire interface to communicate the control data into the DCXO. Unlike quartz or SAW based traditional oscillators, the SiT3922 is available in any combination of voltage (2.5V·or 3.3V), frequency stability (±10, ±25 or ±50 PPM) and package (5032 or 7050) options.


Frequency Range (MHz) 220 to 625
Frequency Stability (PPM) ±10, ±25, ±50
RMS Integrated Phase Jitter (12kHz to 20MHz) <0.5 ps
Nominal Pull Range (PPM)

±25, ±50, ±100, ±150, ±200, ±400, ±800, ±1600

Temp Range (°C) -20 to +70, -40 to +85
Supply Voltage (V) 2.5 and 3.3
Package LxWxH (mm) 5.0 x 3.2 x 0.75, 7.0 x 5.0 x 0.9
Status Production
  • Telecom equipment
  • Wireless basestation
  • Networking and communication electronics
  • Networked video systems and digitizers
  • Jitter cleaner
  • Networked audio systems
  • Instrumentation
  • Low bandwidth analog PLL
  • FPGA data recover

Features Benefits
  • <0.5 ps integrated RMS phase jitter (12 kHz to 20 MHz)
  • Excellent jitter margin for the most stringent applications such as SONET
  • < 0.1% pull range linearity
  • Simpler loop control in software controlled system PLL
  • More consistent PLL bandwidth over operating range
  • Faster calibration and lock time
  • Reduction of modulation harmonics
  • Digitally controlled 1 PPB pull range resolution
  • Frequency from 220 to 625 MHz
  • Pull range from ±25 PPM to ±1600 PPM
  • LVPECL and LVDS output signaling types
  • Supply voltage of 2.5V and 3.3V
  • Frequency stability from ±10 PPM to ±50 PPM
  • Elimates the need for external DAC
  • Customized specifications for optimal system performance
  • Easy availability of any device specification within the operating range
  • Two 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 SiT3922

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 salessupport@sitime.com.

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Subject to change without notice


Frequencies Not Supported

Range 1: From 312.500001 MHz to 419.999999 MHz
Range 2: From 500.000001 MHz to 524.999999 MHz



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