1 to 60 MHz, Stratum 3E OCXO

The SiT5711 is the industry’s smallest Stratum 3E OCXO with ±5 ppb frequency stability and 40 ppt/°C frequency slope (ΔF/ΔT). This device is engineered to provide the best dynamic performance. Leveraging SiTime’s unique DualMEMS™ and TurboCompensation™ temperature sensing technology, this OCXO delivers the most stable timing in the presence of environmental stressors such as airflow, temperature perturbation, vibration, shock, and electromagnetic interference (EMI).

The environmental robustness of SiT5711 enables unmatched ease-of-use and simplifies system design:

  • Can be placed anywhere on the PCB
  • No mechanical cover or shielding needed for thermal isolation
  • No external regulators required
  • No additional sealing needed for high humidity environments

The SiT5711 can be factory-programmed to any frequency between 1 and 60 MHz and the 9 x 7 mm package is the smallest Stratum 3E OCXO available.

View related products: I2C digital frequency tuning

World's smallest OCXO, 75% smaller footprint and 40% thinner
Oscillator Type OCXO
Frequency 1 to 60 MHz
Frequency Stability (ppm) ±0.005 (±5 ppb), ±0.008 (±8 ppb)
Output Type LVCMOS, Clipped sinewave
Operating Temperature Range (°C) -20 to +70, -40 to +85
Voltage Supply (V) 3.3
Package Type (mm²) 9.0 x 7.0
Features Frequency Slope: ±40 ppt/°C; Contact SiTime for ±3 ppb stability; Contact SiTime for -40° to 105°C;
Availability Sampling

10 times better dynamic stability under airflow and fast temp. ramp, ensures best system performance in harsh environments

  • ±5 or ±8 ppb over-temp. stability
  • 2e-11 ADEV at 10 sec under airflow
  • ±40 ppt/°C frequency slope (ΔF/ΔT)

Unmatched ease-of-use, simplifying system design

  • No restrictions on PCB placement
  • No mechanical shielding needed for thermal isolation
  • Resistant to humidity
  • On-chip regulators, no need for external LDOs or ferrite beads

Smallest size, ideal for high density and small form factor systems

  • 9 x 7 mm footprint, 75% smaller
  • 6.5 mm height, 40% thinner

Higher reliability and robustness

  • 20 times better vibration resistance, ideal for outdoor pole mounted equipment
  • Resistant to microphonic and/or board bending effects, ideal for large telecom PCBs
  • Semiconductor-level quality and reliability, batch to batch consistency
  • No activity dips or micro jumps

Programmable platform eliminates long lead times and customization cost associated with legacy quartz OCXO

  • Any frequency from 1 to 60 MHz
  • LVCMOS or clipped sine-wave outputs 
  • SONET/SDH Stratum 3E
  • 4G/5G RRH, DU
  • Base Stations
  • Core and edge routers
  • Carrier class switches
  • IEEE 1588 boundary clocks
  • IEEE 1588 grandmasters
  • GNSS disciplined timing modules
  • Instrumentation
  • Power & energy
  • Defense & aerospace
  • Long-range communications

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SiT6731 Eval Board User Manual – Evaluate oscillator performance

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

Jitter Calculator and Plots – Convert phase noise to phase jitter, find phase noise plots

Time Error Simulation Software – Simulate and analyze the impact of the local oscillator

Reliability Calculator – Get FIT/MTBF data for various operating conditions

Emerald 9x7mm 3D Step Model – Preview oscillator packages in 3D

Narrow By:

Resource Name Type
AN10002 Termination Recommendations for Single-ended Oscillator Driving Single or Multiple Loads Application Notes
AN10006 Best Design and Layout Practices 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
DualMEMS and TurboCompensation Temperature Sensing Technology Technology Papers
SC-AN10033 振荡器频率测量指南 Application Notes
Timing Solutions for Communications & Enterprise Brochures/Fliers
Emerald Platform™ Stratum 3E OCXOs Product Briefs
AN10063 TCXO and OCXO Stability Degradation Application Notes
Phase Noise Measurement Tutorial Videos
PCI Express Refclk Jitter Compliance using a Phase Noise Analyzer Presentations
Network Evolution 5G - Timing and Synchronization Videos
Emerald 9x7mm 3D Step Models
SiT6731EB Evaluation Board User Manual User Manuals
Adaptive Drift Compensation for Holdover Oscillators White Papers
Time Error Simulation - Software and Models White Papers
How to Design with SiTime TCXOs and OCXOs Videos
Timing Solutions for Industrial Brochures/Fliers
Fronthaul and IP RAN Switches Application Briefs
Microwave Outdoor Units (ODU) Application Briefs
Open RAN (ORAN) – Macro and Small Cells Application Briefs
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