Ultra-low power consumption YSN8563MS RTC + YST310S crystal oscillator, the perfect combination for smart door lock timing.

From home fingerprint locks to apartment smart locks, from hotel room card systems to commercial access control, the "YSN8563MS RTC + YST310S crystal oscillator" has become a key tool for smart lock manufacturers to break into the market, thanks to its core advantages of "functional integration, low power consumption, and precise reliability."

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.