Timing devices target mil/aero applications - Embedded.com

Timing devices target mil/aero applications


SiTime’s knows MEMS timing, and their latest set of timing creations are called Endura, which are earmarked for the aerospace and defense market. Applications such as field and satellite communications, precision GNSS, avionics, and space are prime markets for these solutions.

Severe shock, vibration, and extreme temperature are no problem for these robust MEMS solutions because they are proven to have lowest acceleration sensitivity, best shock and vibration resistance, high-reliability (>1 billion hours MTBF), and superior dynamic performance in environments with airflow, thermal gradients, pressure, and power supply noise.

Endura commercial off-the-shelf (COTS) products are engineered for unmatched performance in harsh conditions – such as severe shock, vibration, and extreme temperature which will be routinely experienced in these kinds of applications. Endura has 5 million possible part numbers that can be created from six oscillator types and 17 programmable products.

These TCXOs are available with up to two grades of acceleration sensitivity, as low as 4 parts per trillion per g (ppt/ g ) of acceleration sensitivity, which is 50 times better than legacy quartz-based solutions. This level of performance enables a transformation of the oscillator landscape in aerospace and defense.

Extensive array of part numbers

Endura Super-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

Endura single-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

Endura spread spectrum oscillators to reduce EMI (electro-magnetic interference)

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

Endura differential oscillators for high-speed serial communications

Endura VCXOs (voltage controlled oscillators) for clock synchronization

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

Endura DCXOs (digitally controlled oscillators) for noiseless clock synchronization

  • SiT3541/ SiT3542– 1 to 725 MHz, ultra-low jitter, ±20 to ±50 ppm, I2 C programmable

In addition to commercial off-the-shelf (COTS) products, SiTime offers value-added services including:

  • 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.

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

Visit SiTime’s website for Endura for more details

>> Read the complete article originally published on our sister site, EDN: “Rugged timing solutions for Aerospace and Defense.”

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.