MEMS Timing Solutions for Aerospace and Defense Applications


4 parts per trillion per g force of acceleration – 50 times better than quartz

SANTA CLARA – SiTimeCorporation unveiled its Endura MEMS timing solutions for aerospace and defense applications such as field and satellite communications, precision GNSS, avionics, and space. The Endura products are engineered to offer unmatched performance in harsh conditions – such as severe shock, vibration, and extreme temperature – that are routinely experienced in these applications. The devices also offer maximum choice to customers with 5 million possible part numbers that can be created from 17 programmable products.

About the Endura products

SiTime’s broad portfolio of commercial off-the-shelf (COTS) Endura products spans six oscillator types and 17 products. All devices offer programmable options such as frequency, operating voltage, and stability. In addition, some devices offer specialized programmable features such as spread spectrum, pull-range, and differential output type. Endura products are available with up to two grades of acceleration sensitivity, as low as 4 ppt/g (typical). This breadth of products provides customers with a large selection and the ability to configure each device for their application requirements.

Enduraproducts are also designed for continuity of supply for long-life programs.For more information and datasheets, click on the part links below.

EnduraSuper-TCXOs (temperature compensated oscillators) for use in high-speed communications and GNSS applications

  • SiT5146/SiT5147 – 1 to 220 MHz, ±0.5 to ±2.5 ppm, -40°C to +105°C
  • SiT5346/SiT5347 – 1 to 220 MHz, precision ±0.1 to ±0.25 ppm, -40°C to +105°C
  • SiT5348/SiT5349 – 1 to 220 MHz, ultra-precision ±0.05 ppm

Endurasingle-ended oscillators for use in ruggedized applications

  • SiT8944/SiT8945 – 1 to 137 MHz, -55°C to +125°C
  • SiT2044/SiT2045 – 1 to 137 MHz, -55°C to +125°C, in SOT-23 package for easier manufacturing and solder-joint inspection

Enduraspread spectrum oscillators to reduce EMI (electro-magnetic interference)

  • SiT9045 – 1 to 150 MHz, spread spectrum, -55°C to +125°C

Enduradifferential oscillators for high-speed serial communications

EnduraVCXOs (voltage controlled oscillators) for clock synchronization

  • SiT3342/SiT3343 – 1 to 725 MHz, ultra-low jitter, ±15 to ±50 ppm

EnduraDCXOs (digitally controlled oscillators) for noiseless clock synchronization

  • SiT3541/SiT3542 – 1 to 725 MHz, ultra-low jitter, ±20 to ±50 ppm, I2C programmable


Samples of Endura productsare available now. Production quantities will be available in Q4 2019. Pricing is provided upon request.

In addition to commercial off-the-shelf (COTS) products, value-added services are also available. These services include

  • 100 percent burn-in at high temperature
  • 100 percent electrical test at temperature extremes
  • QCI sample testing for high reliability and customer-generated drawings.

Additional up-screening flows for levels S and B in MIL-PRF-55310E Table III are available from SiTime partners that are on the Qualified Suppliers List of Distributors (QSLD) of the Defense Logistics Agency (DLA). These ITAR-registered suppliers can 100 percent up-screen SiTime Endura devices or sample test them in accordance with MIL-PRF-55310 requirements and MIL-STD-883 methods.