By Cameron Chai
SiTime, a company that manufactures analog semiconductors, has launched high-stable, MEMS voltage controlled, temperature compensated oscillator (VCTCXO) devices.
These devices are utilized in networking, wireless, and telecom applications such as SONET and synchronous ethernet-based devices, instrumentation, GPS, and cellular basestations and repeaters.
SiT5004, SiT5003, SiT5002, and SiT5001 are the four products that belong to this encore-based, programmable VCTCXO series. These four devices support low-stability of ±0.5 PPM, frequencies about 220 MHz, and integrated RMS phase jitter that range from 12 to 20 MHz of 500 fs. The SiT500x products are offered at industry-standard sizes, ensuring 100% substitution of VCTCXOs and quartz TCXOs without altering its design. When compared to other SiTime products, the SiT500x devices render flexibility without any additional lead time or expenditure.
SiT5001, featuring high-performance MEMS VCTCXO, support frequencies from 1to80 MHz and stability that range from ±1 to ±5 PPM. SiT5002, featuring high-frequency, high-performance MEMS VCTCXO, supports frequencies ranging from 80 to 220 MHz and stability between ±1 to ±5 PPM. SiT5003, featuring high-stable MEMS VCTCXO, support frequencies that range from 1 to 80 MHz and a low stability of ±0.5 PPM. SiT5004, featuring high-frequency, high-stable MEMS VCTCXO, support frequencies varying from 80 to 220 MHz and stability as low as ±0.5 PPM.
Each device has its own features and advantages. These devices can support all frequencies that exist within the working range without causing any frequency gaps when compared to the prevailing quartz TCXOs. The value of frequency accuracy is obtained up to six decimal points which is not possible with quartz TCXOs. The selective voltage control feature with stability ranging from ±12.5 to ±50 PPM helps to adjust frequencies after board soldering, thereby improving the performance of the system. They operate at temperatures from -40 to +85°C for industrial purpose and between -20 to +70°C for commercial processes. They offer 1.8V operation and continue up to 2.5 to 3.3V. They provide 500 million hour MTBF for better integrity, 70 g vibration and 50,000 g shock immunity.