1 to 26 MHz, Ultra-Small µPower DCXO


The SiT3901 is the world's smallest, lowest power and lightest-weight digitally-controlled oscillator (DCXO). This MEMS-based DCXO has an ultra-wide pull range up to 15% at fine resolution. It consumes up to 90% less power and 90% less space compared to quartz oscillators. This DCXO offers high resilience to analog noise and the ability to dynamically vary its frequency to match the resonate frequency of the receiver, making it ideal for fast wireless charging systems and other power-sensitive, space-constrained applications.

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"Specs" "Value"
Frequency 1 to 26 MHz
Frequency Stability (ppm) ±50, ±100
Operating Temperature Range (°C) -20 to +70, -40 to +85
Package Type (mm²) 1.5x0.8
Oscillator Type XO-SE
Voltage Supply (V) 1.8, 2.5 to 3.3
Features 105 µA ultra-low power, Smallest size, Digital control with up to ±150,000 ppm pull range and ±1 ppb tuning resolution
Availability 2.6 MHz in Production. Contact SiTime for additional output frequencies.

Wide tuning range via 1-wire serial interface

  • Up to ±150,000 ppm pull range
  • Tuning resolution as low as ±1 ppb
  • Enables the oscillator frequency of the TX to dynamically match the resonate frequency of the RX
  • Eliminates many external passive components needed for traditional resonate matching

Ultra-low power: 105 µA (typical)

  • Extended battery life

Small size: 1.5 x 0.8 mm

  • Up to 90% smaller total footprint compared to quartz solutions

Programmable output drive strength for best EMI or driving multiple loads

  • BOM savings
  • Space savings


  • Wireless Chargers
  • Wearables
  • Portable Medical Devices
  • Earbuds
  • Hearables

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

CSP 1508 4-Pins 3D Step Model – Preview oscillator packages in 3D

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