220 to 725 MHz, Ultra-Low Jitter, ±15 to ±50 ppm VCXO

The Endura™ SiT3343 is a programmable differential VCXO (voltage controlled oscillator), engineered for harsh environments and ideal for high-reliability aerospace and defense applications. This device supports LVPECL, LVDS and HCSL output types with 27 exceptionally linear APR (absolute pull range) options up to ±3145 ppm. The SiT3343 delivers exceptional performance of 0.21 ps jitter (typ.), ±15 ppm, and 0.1% pull range linearity, and is designed to maintain these specs in the presence of common environmental stressors, such as shock, vibration, power supply noise, and EMI.

The MEMS-based Endura SiT3343 conforms to MIL-PRF-55310 and MIL-STD-883 specifications. 

The SiT3343 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.

View related products: 1 to 220 MHz

Small industry standard package enables small form-factor system with stringent jitter requirement
Oscillator Type VCXO-DE
Frequency 220 to 725 MHz
Frequency Stability (ppm) ±25, ±30, ±50
Phase Jitter (rms) 0.23 ps
Output Type LVPECL, LVDS, HCSL
Operating Temperature Range (°C) -40 to +105
Spread Profile ±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, 5.0x3.2, 7.0x5.0
Features Ultra-low acceleration sensitivity, MIL-STD-55310, MIL-PRF-883, Ultra-Low Jitter
Availability Production

Rugged performance under airflow, fast temp. ramp

  • 0.21 ps jitter (typ.)
  • ±15 ppm
  • 0.1% pull range linearity: Ensures best system performance in hostile environments

Low acceleration sensitivity

  • As low as 0.1 ppb/g

0.05 ps/mV power supply noise rejection (PSNR)

  • Simplify 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 (mean time between failure)
  • Lifetime warranty: Reduces field failures due to clock components and the repair costs
  • Airborne communications
  • Command & control
  • Land mobile radio
  • Field communications
  • UAV communications
  • Vehicle comms/telemetry
  • Airframe control
  • Engine management/control
  • Flight computer platform
  • Satellite base station
  • All ruggedized applications
  • Avionics
  • Satcom
  • GNSS/navigation

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Frequency Slope (dF/dT) Calculator – Calculate frequency slope over temperature

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Resource Name Type
AN10006 Best Design and Layout Practices Application Notes
AN10020 Definitions of VCXO Specifications Application Notes
AN10025 Reliability Calculations for SiTime Oscillators Application Notes
AN10028 Probing Oscillator Output Application Notes
AN10033 Frequency Measurement Guidelines for Oscillators Application Notes
SiTime's MEMS First™ and EpiSeal™ Processes Technology Papers
AN10029 Output Terminations for Differential Oscillators Application Notes
DualMEMS and TurboCompensation Temperature Sensing Technology Technology Papers
SC-AN10033 振荡器频率测量指南 Application Notes
AN10062 Phase Noise Measurement Guide for Oscillators Application Notes
MEMS Timing for High Reliability Applications Product Briefs
QFN 3225 6-Pins 3D Step Models
QFN 5032 6-Pins with CP 3D Step Models
SiT3343 Datasheet Datasheets
Timing Solutions for Aerospace & Defense Brochures/Fliers
SiTime MEMS Timing Solutions (8.5x11) Brochures/Fliers
SiTime MEMS Timing Solutions (A4) Brochures/Fliers
SiTime MEMS Timing Solutions (A4) Chinese Brochures/Fliers
Building Robust Aerospace and Defense Products with Ruggedized Endura MEMS Oscillators White Papers
Silicon Replaces Quartz (Japanese Subtitles) Videos
Silicon Replaces Quartz (Chinese Subtitles) Videos
SiTime MEMS First 工艺 Technology Papers
AN10073 How to Setup a Real-time Oscilloscope to Measure Jitter Application Notes
AN10071 Computing TIE Crest Factors for Telecom Applications Application Notes
AN10070 Computing TIE Crest Factors for Non-telecom Applications Application Notes
AN10072 Determine the Dominant Source of Phase Noise, by Inspection Application Notes
AN10074 Removing Oscilloscope Noise from RMS Jitter Measurements Application Notes