Clock Generators

SiTime clock generators are engineered to deliver high performance and the highest level of clock tree integration by consolidating multiple clock ICs into a single device. Our Cascade™  MEMS-based clock generators integrate the SiTime third-generation ApexMEMS™ resonator which eliminates the crystal reference required by traditional clocks.

Cascade Platform MEMS-based Clock Generator Package

MEMS Clock Generators

Cascade™ MEMS-based clock generators feature 4 independent Frac-N PLLs, 4 inputs, up to 10 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 Buy Now Number of Inputs Number of Outputs Max. Output Frequency Number of PLL/Clock Domains Phase Jitter(rms) Package(mm)
SiT95141 Contact Sales 4 10 2.1 GHz 4 PLL 1 time domain 120 fs 9x9 mm, 64-pin QFN
44-pin 7x7 mm QFN Clock Generators - Network Synchronizers - Jitter Cleaners package

Clock Generators

These clock generators feature 4 independent quad fractional PLLs, 4 inputs, up to 12 outputs, wide frequency range from 200 kHz to 2.1 GHz, and a rich set of programmable features in small QFN packages.

  • Low 85 fs integrated jitter minimizes bit error rate and increases design margin
  • Always-reliable startup even at cold temperature and in other harsh environmental conditions
  • When combined with a MEMS oscillator, quartz-related issues are eliminated including jitter degradation because of noise coupling onto a crystal interface, activity dips/frequency jumps and vibration sensitivity
Device Datasheet Buy Now Number of Inputs Number of Outputs Max. Output Frequency Number of PLL/Clock Domains Phase Jitter(rms) Package(mm)
SiT95210 Contact Sales 4 4 2.94912 GHz 4 PLL 85 fs typ.; 70 fs typ. (with MEMS oscillator) 7x7 mm, 44-pin QFN
SiT95211 Contact Sales 4 12 2.94912 GHz 4 PLL 85 fs typ.; 70 fs typ. (with MEMS oscillator) 9x9 mm, 64-pin QFN
3x3 mm, 12-pin DFN Real Time Clock (RTC) package

Real-time Clock

SiTime’s real-time clock (RTC) and calendar device offers dual I2C bus support that allows access for two master devices, such as a CPU and BMC chip. The RTC is optimized for ultra-low power consumption and has a built-in voltage-level detection circuit that detects power status and voltage level.

  • Provides year, month, day, weekday, hours, minutes and seconds based on a 32.768 kHz MEMS oscillator or quartz crystal
  • Support daylight saving mode, leap-year compensation, selectable 24-hour and 12-hour mode
  • Automatic power-level detect and switch circuitry, automatically switches to the backup battery power supply (VBAT) and continues operation with very low current
Device Datasheet Buy Now Number of Inputs Number of Outputs Max. Output Frequency Number of PLL/Clock Domains Phase Jitter(rms) Package(mm)
SiT95901 Contact Sales 1 1 1 Hz n/a n/a 3x3 mm, 12-pin DFN