SiTime Unveils Ruggedized MEMS Timing Solutions for Aerospace & Defense

SiTime has announced the release of its new Endura MEMS timing solutions portfolio for aerospace and defense applications. 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. Important applications include satellite communications, precision GNSS, avionics, and space.

When exposed to high levels of shock, vibration, and extreme temperatures, legacy timing components have been prone to failure, degrading system performance and reliability. To solve these problems, SiTime created an oscillator system of silicon MEMS, analog 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.

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. The products are also designed for continuity of supply for long-life programs.

SiTime ENDURA SOLUTIONS: 

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

• SiT9346/SiT9347 – 1 to 725 MHz, ultra-low jitter

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, I2C programmable

Samples of Endura products are available. 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% burn-in at high temperature
• 100% 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.