Digitally Controlled Oscillators

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Digitally Controlled Oscillator VCXO Package 6-pin Top Bottom

Digitally Controlled Oscillators

SiTime digitally controlled MEMS oscillators (DCXOs) enable users to tune output frequency by up to ±150,000 ppm via a one-wire digital interface. This eliminates the need for an external DAC used for traditional VCXO designs. It also eliminates the frequency shift caused by board noise on the voltage control line.

  • Wide pull range options, up to ±150,000 ppm
  • Tuning resolution of 1 ppb
  • Ultra-low power and small footprint (SiT3901)
  • Wide range of frequencies (up to 625 MHz), supply voltages (1.8 V; 2.5 V to 3.3 V), and industry-standard packages (1508, 3225, 5032, or 7050)
  • LVCMOS output (SiT3907 and SiT3901) and differential outputs (SiT3921 and SiT3922)
Digitally Controlled Oscillators Products
Device Datasheet Buy Now Frequency Stability(ppm) Output Type Supply Voltage(V) Temp. Range(°C) Package Size(mm) Availability
SiT3521 Buy Now
  • 1 to 340 MHz
  • ±20
  • ±25
  • ±50
  • LVPECL
  • LVDS
  • HCSL
  • 2.5 to 3.3
  • -20 to +70
  • -40 to +85
  • -40 to +105
  • 5.0 x 3.2 10-pin
  • Production
SiT3522 Buy Now
  • 340 to 725 MHz
  • ±20
  • ±25
  • ±50
  • LVPECL
  • LVDS
  • HCSL
  • 2.5 to 3.3
  • -20 to +70
  • -40 to +85
  • -40 to +105
  • 5.0 x 3.2 10-pin
  • Production
SiT3901 Contact Sales
  • 2.6MHz, 6.78MHz and 13.56MHz. Contact SiTime for other output frequencies (1 to 26MHz)
  • ±50
  • ±100
  • LVCMOS
  • 1.8
  • 2.5 to 3.3
  • -20 to +70
  • -40 to +85
  • 1.5x0.8
  • Production
SiT3907 Buy Now
  • 1 to 220 MHz
  • ±10
  • ±25
  • ±50
  • LVCMOS
  • 1.8
  • 2.5
  • 2.8
  • 3.3
  • -20 to +70
  • -40 to +85
  • 3.2x2.5
  • 5.0x3.2
  • 7.0x5.0
  • Production
SiT3921 Buy Now
  • 1 to 220 MHz
  • ±10
  • ±25
  • ±50
  • LVPECL
  • LVDS
  • 2.5
  • 3.3
  • -20 to +70
  • -40 to +85
  • 3.2x2.5
  • 5.0x3.2
  • 7.0x5.0
  • Production
SiT3922 Buy Now
  • 220 to 625 MHz
  • ±10
  • ±25
  • ±50
  • LVPECL
  • LVDS
  • 2.5
  • 3.3
  • -20 to +70
  • -40 to +85
  • 3.2x2.5
  • 5.0x3.2
  • 7.0x5.0
  • Production

Key Resources

AN10041 Designing with the SiT39xx Family of DCXOs (Digitally Controlled Oscillators)

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