The SiT5155 Super-TCXO is engineered for high-accuracy GNSS systems in precision farming, survey, construction, and other industrial equipment. Based on SiTime’s unique DualMEMS™ and TurboCompensation™ temperature sensing technology, this device delivers exceptional dynamic performance that enables the fastest lock to satellites in the presence of shock, vibration, rapid temperature change, power supply noise, and electromagnetic interference (EMI). The SiT5155 further minimizes the loss of satellite lock by eliminating activity dips and micro jumps.

12 frequencies
Frequency Stability (ppm)
±0.5, ±1, ±2.5
Operating Temperature Range (°C)
-20 to +70, -40 to +85, -40 to +105
Oscillator Type
Output type
LVCMOS, Clipped sinewave
Package Type (mm²)
5.0 x 3.2 10-pin
Phase Jitter (RMS)
0.31 ps
Pull Range (ppm)
±6.25, ±10, ±12.5, ±25, ±50, ±80, ±100, ±125, ±150, ±200, ±400, ±600, ±800, ±1600, ±3200
Precision TCXO
Voltage Supply (V)
2.5, 2.8, 3, 3.3
  • Industrial GNSS
  • Telecom GNSS
  • Precision GNSS
  • GPS/GNSS Modules


Features & Benefits

Exceptional dynamic stability under airflow, fast temp. ramp

  • ±500 ppb over-temp. stability
  • 3e-11 ADEV at 10 second average time
  • ±15 ppb/°C frequency slope (ΔF/ΔT), 10 °C/min ramp
    • Enables fastest satellite lock under any operating conditions

20x better phase noise under vibration

  • Minimizes loss of satellite lock in high-vibration environments

No activity dips or micro jumps

  • Eliminates the need for costly screening or burn-in test

0.2 ps/mV power supply noise rejection (PSNR)

  • Reduces BOM by eliminating a dedicated LDO for the TCXO

LVCMOS or Clipped sinewave output

  • Optimize for best balance between EMI and jitter

Digital frequency tuning through I2C

  • Eliminate frequency shift caused by board noise

Superior reliability

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


Quality Documents

Additional Resources