Clock Generators

The Cascade™ family of clock generators are engineered to deliver the highest level of clock tree integration, consolidating multiple clock ICs and oscillators into a single device. These MEMS clock generators integrate SiTime’s third-generation MEMS resonator and eliminate the crystal reference required by traditional clocks.  By removing the dependency on quartz, all quartz related issues are eliminated. This integrated MEMS approach improves system robustness – no jitter degradation due to noise coupling with the crystal circuit, always-accurate frequency synthesis without crystal capacitive mismatching, 10 times more vibration resistant, and always-reliable startup in cold temperature and other harsh environmental conditions.

MEMS Clock Generators

Cascade family of MEMS clock generators feature 4 independent Frac-N PLLs, 4 inputs, up to 11 outputs, wide frequency range from 8 kHz to 2.1 GHz, and a rich set of programmable features in a small 9 x 9 mm package. By integrating the MEMS resonator, these devices enable designers to create a clock-system-on-a-chip and eliminate all quality and reliability issues associated with traditional quartz-based clocks.

  • Always-accurate clock synthesis by eliminating crystal capacitive mismatch
  • Always-reliable startup even at cold temperature and in other harsh environmental conditions
  • No jitter degradation because of noise coupling onto a crystal interface
  • No activity dips/frequency jumps inherent with quartz
  • 10x more resistant to vibration and board bending
Device Datasheet Number of Inputs Number of Outputs Max. Output Frequency Number of PLL/Clock Domains Phase Jitter(rms) Package(mm)
SiT95141 4 10 2.1 GHz 4 PLL 1 time domain 120 fs 9x9 mm, 64-pin
SiT95143 4 11 2.1 GHz 4 PLL 1 time domain 120 fs 9x9 mm, 64-pin