SiTime adds to Endura TCXO family
Author: EIS Release Date: Aug 7, 2023
SiTime is sampling a new member to its Endura MEMS ruggedized Super-TCXO family—the SiT5543 with volume production expected in early 2024.
The device offers ±5 ppb frequency stability over temperature from -40 °C to 95 °C, even during fast temperature transients and under vibration.
It claims to deliver a 20x improvement in stability over existing open-market, quartz-based TCXOs, which, according to SiTime, can’t provide stability better than ±100 ppb.
Prior to the advent of SiTime’s Super-TCXOs, designers had to use oven-controlled crystal oscillators (OCXOs) to achieve ±5 ppb stability in aerospace and defense systems.
However, quartz-based OCXOs pose several drawbacks. They are, says SiTime, expensive, bulky, fragile and power hungry.
The SiT5543 claims to overcome these challenges and offers designers of ruggedized systems an option that matches the temperature stability of conventional OXCOs.
It claims to provide 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 device claims to reduce bit error rate, system size and power consumption while enhancing reliability and operational performance in harsh operating conditions.
The technical specifications of the device enable secure, timing-dependent encryption technology to protect military radios, GPS receivers, navigation and guidance systems from jamming events.
The device provides the stability over temperature and under vibration required for high-speed networks in aerospace and defense systems.
The part aims to reduce risk, cycle time and cost in meeting tough operational requirements.
The device aims to reduce design cost and complexity due to its 7 mm x 5 mm surface-mount footprint, low power requirements and 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 claims to eliminate the high cost, risks, and delays of custom oscillators.
The device 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.
The SiT5543 MEMS Super-TCXO is manufactured using semiconductor processes with statistical process control and 6-sigma specification limits to ensure each device operates reliably out of the box and meets specification in the lab and in real-world operating conditions.