The CM315D32768DZFT is a compact, surface-mount tuning fork crystal oscillator designed for precision timing applications. It operates at a nominal frequency of 32.768kHz, which is a standard frequency for real-time clocks (RTCs) and other timing applications. The component is housed in a ceramic package with dimensions of 3.2mm x 1.5mm x 0.9mm, making it suitable for use in space-constrained applications.
The crystal oscillator offers frequency tolerances of ±5ppm, ±10ppm, and ±20ppm at 25°C, allowing designers to choose the appropriate level of precision for their application. The load capacitance options range from 6.0pF to 12.5pF, providing flexibility in matching the oscillator to the circuit requirements. Operating over a temperature range of -40°C to +85°C, this component is versatile for use in a variety of environments, from industrial to consumer products.
Crystal Oscillator
Crystal oscillators are fundamental components in electronic circuits, providing precise timing and frequency control. They operate on the principle of piezoelectricity, where an applied voltage causes a crystal to oscillate at a specific frequency. This frequency is determined by the cut and size of the crystal, making these components essential for applications requiring accurate timekeeping, such as watches, clocks, and real-time clocks (RTCs) in microcontrollers.
When selecting a crystal oscillator for a design, engineers must consider factors such as frequency, load capacitance, operating temperature range, and frequency tolerance. The choice of frequency is critical, as it determines the oscillator's primary function. Load capacitance affects the oscillator's ability to start and maintain oscillation, while the operating temperature range ensures reliable performance under varying environmental conditions.
Frequency tolerance is another important parameter, indicating how much the actual frequency may deviate from the nominal frequency. This is particularly relevant in applications where timing accuracy is critical. Additionally, the package size and mounting type (e.g., surface mount or through-hole) must be compatible with the overall circuit design.
In summary, crystal oscillators are indispensable in providing stable and accurate timing solutions in a wide range of electronic applications. Their selection and integration into circuits require careful consideration of their electrical and physical characteristics to ensure optimal performance.