220 to 725 MHz Ultra-low Jitter Differential VCXO


The SiT3373 is a high-frequency, programmable differential VCXO (voltage controlled oscillator) that supports LVPECL, LVDS and HCSL output types with 27 exceptionally linear APR (absolute pull range) options up to ±3145 ppm. Based on SiTime's unique Elite Platform™, this device delivers exceptional dynamic performance of 0.23 ps jitter (typ.), ±10 ppm, and 0.1% pull range linearity with same excellent phase noise. Elite products are engineered to maintain these specs in the presence of common environmental hazards, such as shock, vibration, power supply noise, EMI, and board bending.

The SiT3373 can be factory-programmed to any combination of frequency, stability, voltage and pull range. This programmability enables designers to optimize clock configuration while eliminating the long lead time and customization costs associated with custom quartz VCXOs.


Small industry standard package enables small form-factor system with stringent jitter requirement
"Specs" "Value"
Oscillator Type VCXO-DE
Frequency 220 to 725 MHz
Frequency Stability (ppm) ±15, ±25, ±30, ±50
Phase Jitter (rms) 0.23 ps
Operating Temperature Range (°C) -20 to +70, -40 to +85, -40 to +105
Pull Range (ppm) ±25, ±50, ±80, ±100, ±150, ±200, ±400, ±800, ±1600, ±3200
Voltage Supply (V) 2.5, 2.8, 3.0, 3.3
Package Type (mm²) 3.2x2.5, 7.0x5.0, 5.0x3.2
Features Ultra-low jitter
Availability Production

Exceptional dynamic performance in real-life operating conditions

  • 0.23 ps jitter
  • ±10 ppm
  • 0.1% pull range linearity: Ensures best system performance in hostile environments

Same excellent phase noise under vibration

  • Minimizes link and data loss in high-vibration environments

0.05 ps/mV power supply noise rejection (PSNR)

  • Reduces BOM with simpler power supply design

3.0 x 2.5 mm package

  • Enables small form-factor system with stringent jitter requirement

Flexible programmable features

  • 220 to 725 MHz
  • 2.25 to 3.63 V
  • ±25 to ±3200 ppm pull range
  • LVPECL, LVDS, HCSL: Customize oscillator specifications for optimal system performance

Superior reliability

  • 1 billion hours MTBF
  • Lifetime warranty: Reduces field failures due to clock components and the repair costs


  • Cable model termination system (CMTS)
  • Telecom equipment
  • Wireless base stations
  • Networked video systems and digitizers
  • Jitter cleaner
  • Instrumentation
  • Networked audio systems
  • FPGA data recovery

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