MSC offers the SiT5301 and SiT5302 Stratum 3 compliant silicon MEMS oscillators from SiTime. These oscillators are suited for use in demanding telecommunications and network technology applications such as SONET, synchronous Ethernet-based core and edge routers, wireless base stations as well as IP timing and intelligent smart grid applications.
SiT5301 covers the lower frequency range from 1 MHz to 60 MHz and the SiT5302 covers the higher frequency range from 60 MHz to 220 MHz. The oscillators, which are also offered in a 2520 compatible package. If required, the two high-precision oscillators are also available in 3225, 5032 and 7050 packages. A frequency, which is programmable with up to 6 decimal places of accuracy, and an enhanced voltage-controlled pull range of up to ±12.5 ppm for in-system calibration and fine tuning provide the highest level of frequency accuracy with both the SiT5301 and SiT5302.
The MEMS-based ±100 ppb oscillators do not require "activity dips". This results in a higher frequency stability and improved system performance over the entire operating temperature range. With ±0.1 ppm frequency stability in the commercial temperature range from 0°C to +70°C, holdover stability of at least ±0.37 ppm/24 hours, a guaranteed frequency stability of ±4.6 ppm/20 years and 500 femtoseconds typical of integrated RMS phase jitter in the range 12 kHz to 20 MHz, the Telcordia GR-1244 Stratum 3 frequency stability specifications for timing applications are not only completely fulfilled, but also in some respects even exceeded.
The operating voltage range from 2.5 to 3.3 V eliminates possible level changes and supports all common telecommunications and network SoCs, ASICs as well as FPGAs, the SoftEdge configurable rise/fall time improves the impedance matching of signal lines and reduces electromagnetic interference(EMI). With 50,000 g shock resistance, 70 g vibration resistance and a mean time between failures (MTBF) of 500 million hours, the products perform 10 times better than comparable quartz crystal-based TCXOs and OCXOs.
