This temperature-controlled oscillator is intended for aerospace and defence systems and offers unmatched stability in challenging environments. SiTime’s ruggedised SiT5543 Super-TCXO offers a ±5 ppb frequency stability over temperature from -40 °C to 95 °C, even during fast temperature transients and under vibration.
The SiT5543 also provides a 20x improvement in stability over existing open-market, quartz-based TCXOs, which are unable to provide stability better than ±100 ppb.
Quartz-based OCXOs pose several drawbacks. They are expensive, bulky, fragile and power hungry. The SiT5543 offers designers of ruggedised systems an alternative that matches the temperature stability of conventional OXCOs, according to SiTime. It provides 100x higher reliability, 2x lower power consumption and 40 percent smaller size than quartz OCXOs, making the SiT5543 a suitable replacement for OCXOs in demanding applications such as high-speed data communications, military networks, electronic systems and avionics.
The SiT5543 Super-TCXO significantly reduces bit error rate, system size and power consumption while enhancing reliability and operational performance in harsh operating conditions.
The technical specifications of this MEMS-based Super-TCXO enable secure, timing-dependent encryption technology to protect military radios, GPS receivers, navigation and guidance systems from jamming events and provides the stability, over temperature and under vibration, required for high-speed networks that form the backbone of today’s aerospace and defence systems.
The SiT5443 Super-TCXO also reduces design cost and complexity due to its small 7 mm x 5 mm surface-mount footprint, low power requirements and unique ability to mitigate the effects of harsh operating conditions.
Since it is factory-programmable to support output frequencies ranging from 1 to 60 MHz, it eliminates the high cost, risks, and delays of custom oscillators.
The SiT5543 is available with I2C digital control for on-the-fly frequency tuning or for advanced user-defined compensation. Digital control provides noise-insensitive frequency adjustment with smooth frequency shifts.
