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SiTime sampling rugged MEMS timers

SiTime has unveiled Endura MEMS timing solutions for aerospace and defence applications such as field and satellite communications, precision GNSS, avionics, and space.

The Endura products have been engineered to offer improved levels of 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.

“When exposed to high levels of shock, vibration and extreme temperatures, legacy timing components have been prone to failure, degrading system performance and reliability,” said Piyush Sevalia, executive vice president of marketing. “To solve these problems, SiTime has created an oscillator system of silicon MEMS, analogue circuits, compensation algorithms and advanced packaging, which is designed to outperform any other available timing solution in harsh environments. For example, Endura precision TCXOs deliver 4 parts per trillion per g (ppt/g) of acceleration sensitivity, which is 50 times better than legacy quartz-based solutions. With such performance, we believe that Endura will transform the oscillator landscape in aerospace and defence.”

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.

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

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

Endura DCXOs (digitally controlled oscillators) for noiseless clock synchronisation

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

Author
Neil Tyler

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