Q: Are OCXOs suitable for battery-powered applications?

A: An OCXO and an atomic clock are both used as high-precision frequency references, but they are based on different technologies and serve different levels of timing requirements. An OCXO uses oven-controlled quartz technology to maintain the crystal resonator at a controlled temperature, reducing frequency changes caused by environmental temperature variations. SJK’s OCXO products provide frequency accuracy of up to ±3 ppb / ±10 ppb and are designed for applications requiring highly stable timing and frequency references.

SJK also lists atomic clock reference systems among the typical application areas for its OCXO products, showing that OCXOs can be used as part of high-precision timing systems. Compared with atomic frequency references, an OCXO is a quartz-based solution that combines high stability with relatively compact SMD and DIP package options. The appropriate choice ultimately depends on the required frequency accuracy, stability, application environment, and system design.

A: Yes. In network synchronization switches using SyncE/PTP, OCXOs are a core component for clock holdover. At SJK, we identify AI and computing as important application areas for our crystal oscillator technology. Our application materials describe crystal oscillators as reference clocks for AI systems, where real-time data processing, low-latency decision-making, and communication stability are important requirements. We also manufacture high-precision OCXO using oven-controlled technology to isolate quartz crystal resonators from external temperature variations.

Our OCXO products are designed to provide extremely high frequency stability and excellent low phase noise performance. This makes OCXO technology part of our frequency-control solutions for high-precision timing requirements. Our broader oscillator portfolio also includes differential oscillators for high-speed digital applications and TCXO for applications requiring frequency accuracy and temperature stability.

A: OCXOs are intended for applications that require a highly stable frequency reference and precise timing performance. SJK’s OCXO products use oven-controlled technology to isolate the quartz crystal resonator from external temperature variations, providing high frequency stability and low phase noise. The SJK OCXO range covers output frequencies from 5 MHz to 100 MHz, with frequency accuracy of up to ±3 ppb / ±10 ppb depending on the product.

Typical applications listed by SJK include base station communication systems, precision test and measurement equipment, satellite navigation systems, high-precision clock synchronization networks, telecommunication infrastructure, and frequency standard equipment. OCXOs are therefore more suitable for systems where frequency stability is a key requirement rather than for basic clock applications. SJK offers multiple supply voltages, package options, and output formats, as well as customized frequency and specification solutions for different high-precision timing requirements.

A: Drive level refers to the power consumed by a crystal during operation. It is an important parameter because the crystal needs to operate within its specified drive-level range. If the applied drive level exceeds the recommended limit, the crystal may be damaged or its long-term performance may be affected. SJK specifies drive-level requirements for different crystal products according to their design and frequency range.

Some SMD crystal series have a typical drive level of 100 μW, while automotive crystal products can offer different drive-level options such as 10 μW, 100 μW, and 200 μW or customized specifications. When selecting a crystal, the drive level should therefore be checked together with frequency, load capacitance, ESR, and other circuit parameters. SJK also supports circuit matching and product selection, helping customers evaluate the appropriate crystal specifications for their designs.

A: Yes. A decoupling capacitor is recommended for active oscillators to help maintain a stable power supply and reduce noise around the oscillator. A commonly used value is 0.1 μF, placed as close as possible to the oscillator’s VCC pin. Keeping the capacitor close to the power pin helps minimize noise along the power-supply path and supports stable oscillator operation. The capacitor should be considered during the circuit design stage rather than added only after the PCB has been completed. The specific power-supply arrangement should also be checked against the electrical specifications of the selected oscillator and the requirements of the target circuit.

For customers working on a new design or replacing an existing timing component, SJK provides technical support covering component selection and circuit matching. This allows the power-supply design, component specifications, and application requirements to be considered together during the selection process. For projects with specific circuit conditions, our technical team can also assist with evaluating the suitability of the selected component before production.