Advantages and disadvantages of active crystal oscillators and passive crystal oscillators

Communication equipment (5G base stations, optical modules, frequency ≥100MHz). Precision instruments (atomic clock synchronization, TCXO/OCXO temperature-compensated crystal oscillators). Complex environments: industrial control (vibration resistant, wide temperature range -40℃ to +125℃). Direct drive: FPGA global clock, high-speed SerDes interface (e.g., 25Gbps Ethernet).

The effect of temperature on RTC crystal oscillators

The main matching crystal oscillator for RTC is a 32.768kHz tuning fork crystal oscillator. The frequency stability of the tuning fork crystal oscillator is significantly affected by temperature. With 25℃ as the reference, the further the temperature deviates, the greater the frequency drift. For example, the temperature drift can reach -49ppm at -10℃ or 60℃, which leads to increased timing errors.

YSO212PU Series — Ultra-Low Jitter Programmable Differential Oscillator

The YSO212PU series programmable differential oscillators offer a stable and reliable clock source for demanding applications such as AI computing clusters, cloud computing infrastructure, optical communication transmission equipment, hyperscale data centers, 5G base stations, high-speed Ethernet, and precision test instruments, thanks to their superior low jitter performance, full-band customizable frequency capabilities, and miniaturized and highly reliable design.

Three essential things to know about active crystal oscillators: circuit diagram, pin diagram, and wiring diagram.

The typical usage of an active crystal oscillator is as follows: pin 1 is left floating, pin 2 is grounded, pin 3 is connected to the output, and pin 4 is connected to the voltage.

Crystal oscillator drive power testing and calculation

Test Method： Equipment Preparation: PCB board, crystal oscillator (with equivalent circuit constant data), oscilloscope, current probe. Circuit Connection: Desolder one side of the crystal oscillator pins, connect a lead in series with the current probe, and resolder it back onto the PCB, ensuring the circuit is intact.

YXC YOV1919DP series of temperature-controlled crystal oscillators—ultra-low power consumption and fast startup, empowering the era of high stability in mobile communications.

The YOV1919DP series temperature-controlled crystal oscillators represent YXC Yangxing Technology's latest achievements in high-stability frequency control. With its four key characteristics—ultra-low power consumption, fast startup, highly stable output, and low phase noise—it provides mobile communication and wireless systems with a frequency solution offering higher energy efficiency and faster response speeds.