Precision TCXOs

SiTime MEMS precision oscillators are engineered to deliver the most stable timing under environmental stressors – airflow, rapid temperature change, shock, vibration, poor power supply, and EMI. These devices can be factory-programmed to any combination of frequency, stability, voltage, and pull range, eliminating the long lead times and customization costs associated with quartz TCXOs and OCXOs.


Elite Platform™ Super-TCXOs are tight stability (±0.1 ppm to ±2.5 ppm), 1 to 220 MHz precision oscillators with exceptional dynamic performance and rich features. These devices solve deep-rooted timing problems for telecom, networking, and precision GNSS systems. They can be used to replace legacy quartz OCXOs in emerging 5G and IEEE 1588 synchronization applications while reducing power and size.

  • 30x better dynamic stability (ΔF/ΔT of approx. 1 ppb/°C), resistant to airflow and thermal shock

  • -40°C to 105°C operation uniquely enables fan-less outdoor equipment

  • I2C digital frequency tuning eliminates external DAC and sensitivity to board noise

  • On-chip power supply noise filtering eliminates dedicated LDO

  • No activity dips or micro-jumps 

Automotive TCXOs

SiTime’s AEC-Q100 automotive TCXOs are based on the Elite Platform™ and are engineered to deliver the highest dynamic performance, reliability and robustness, making them ideal for autonomous driving systems. These 1 to 220 MHz precision devices with tight stability (±0.1 ppm to ±2.5 ppm) over AEC-Q100 Grade-2 temperature from -40°C to 105°C, solve deep-rooted timing problems in harsh automotive environments.

  • 30x better dynamic stability (ΔF/ΔT of approx. 1 ppb/°C), resistant to airflow and thermal shock

  • AEC-Q100 Grade-2 -40°C to 105°C operation for high-temp environments

  • Industry best G-sensitivity of 0.1 ppb/g

  • Best shock resistance at 10,000g, best vibration resistance at 70g

  • Highest reliability at over 1 billion hours MTBF (< 1 FIT)


SiTime's programmable temperature-compensated oscillators (TCXOs) are the most flexible and reliable solutions for telecom, networking, and industrial applications. They are pin-compatible with quartz TCXOs, enabling 100% drop-in replacement without redesign or layout changes.

  • Wide frequency range from 1 MHz to 625 MHz

  • LVCMOS, LVPECL, and LVDS support

  • Tight frequency stability at ±5 ppm

  • Optional voltage control with a wide pull range (up to ±1600 ppm)