SIT9025 AEC-Q100-Compliant MEMS Oscillators

By SiTime 73

SIT9025 AEC-Q100-Compliant MEMS Oscillators

The SiT9025 from SiTime Corporation is one of the industry's first AEC-Q100-compliant, automotive-grade spread spectrum oscillators. This device solves EMI problems by offering two techniques for emissions compliance: spread spectrum clocking and rise/fall time adjustment of the clock signal. The SiT9025 comes in three industry-standard packages and is supported by SiTime's Time Machine II programmer that allows engineers to replace quartz products without any design changes, and instantly program spread modulation and/or drive strength to quickly reduce emissions levels. This combination enables customers to accelerate time to revenue by ensuring emissions compliance with minimum engineering effort.

The increasing number of high-performance infotainment and wireless systems deployed in today's connected automobiles requires designers to pay special attention to electromagnetic energy present at frequencies to which these systems are sensitive. Electromagnetic interference (EMI) can be problematic in AI server/ECUs or ADAS camera modules that depend on the transfer of high volumes of data at high speeds. The clock can be the largest contributor of noise and often this EMI is not observed until the final stages of qualification. This can cause rework late in the design cycle, incurring unplanned delays and costs. SiT9025 MEMS oscillators are ideal for automotive ADAS camera and ADAS ECU applications.

  • Spread spectrum for EMI reduction
    • Widespread % option
      • Center spread: from ±0.125% to ±1%, ±0.125% step size
      • Down spread: -0.25% to -2% with -0.25% step size
  • Spread profile option: triangular, Hershey-kiss, random
  • Programmable rise/fall time for EMI reduction: 8 options, 0.25 ns to 40 ns
  • Any frequency between 1 MHz and 150 MHz accurate to 6 decimal places
  • 100% pin-to-pin drop-in replacement to quartz-based XOs
  • Excellent total frequency stability as low as ±20 ppm
  • Operating temperature from -55°C to +125°C.
  • Low power consumption of 4.0 mA typical at 1.8 V
  • Pin1 modes: standby, output enable, or spread disable
  • Fast startup time of 5 ms
  • LVCMOS output
  • Industry-standard packages
    • QFN: 2.0 mm x 1.6 mm, 2.5 mm x 2.0 mm, 3.2 mm x 2.5 mm
  • RoHS and REACH compliant, Pb-free, halogen-free, and antimony-free


  • ADAS camera
  • High-speed serial link