Digitally Controlled Oscillators

Digitally Controlled VCXO

SiTime's digitally controlled MEMS oscillators (DCXO) enables users to tune output frequency by up to ±1600 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, including ±25, ±50, ±100, ±150, ±200, ±400, ±800, or ±1600 ppm
  • Pull range resolution of 1 ppb
  • Any combination of frequencies (up to 625 MHz), supply voltage (1.8 V; 2.5 V to 3.3 V), pull range (±25 ppm to ±1600 ppm), and industry-standard packages (3225, 5032, or 7050)
  • LVCMOS output (SiT3907) and differential outputs (SiT3921 and SiT3922)