Crystal Oscillator Metal Type 32 KHz | 32.76 KHz | 6 MHz | 8 MHz | 11.05 MHz | 12 MHz | 16 MHz | 20 MHz | 22.11 MHz | 24 MHz | 24.57 MHz

Crystal Oscillator General Specifications

1. Frequency Range
   • 32 KHz: Often used in timekeeping applications such as RTC (Real-Time Clock) circuits.
   • 32.76 KHz: Close to 32 KHz, typically used in low-power circuits.
   • 6 MHz: Commonly used in microcontroller clocks or basic timing applications.
   • 11.05 MHz: Higher frequency range, suitable for RF applications, communications, and precision timing circuits.
   • 24 MHz: Ideal for high-speed applications, commonly seen in USB systems, microcontrollers, and clock circuits.
   • 24.57 MHz: Close to 24 MHz, useful for similar high-speed applications.
2. Package Type
   • Metal Can Type (HC-49/U, HC-49/S): These are widely used for their reliability and robust packaging. The most common types are:
     • HC-49/U: A through-hole package.
     • HC-49/S: A smaller surface-mount version.
   • Other Metal Packages: Smaller SMD metal packages like UM-1 or UM-5 can also be used, depending on space requirements.
3. Operating Temperature
   • The standard temperature range is usually from -20°C to +70°C.
   • Industrial temperature range: -40°C to +85°C.
4. Frequency Tolerance
   • Frequency tolerance can range between ±20 ppm (parts per million) to ±100 ppm.
   • The tolerance depends on the application, with precision oscillators requiring lower ppm.
5. Frequency Stability
   • Similar to tolerance, frequency stability over temperature changes can range from ±20 ppm to ±100 ppm.
6. Load Capacitance
   • Crystal oscillators typically have load capacitances of 6 pF to 32 pF, depending on the circuit design.
   • This should match the requirements of your oscillator circuit for optimal performance.
7. Drive Level
   • The typical drive level for a crystal oscillator is between 1 µW to 500 µW, which should be specified according to the application to avoid overdriving the crystal.
8. Aging
   • Crystals typically have an aging specification of ±3 ppm/year or better. This describes the change in frequency over time.
9. Equivalent Series Resistance (ESR)
   • The ESR can range from 20 ohms to 100 ohms, depending on the frequency.
   • Higher frequencies tend to have lower ESR values.
10. Shunt Capacitance (C0)
    • Typical values for shunt capacitance range between 3 pF to 7 pF.

Application Examples for Specific Frequencies

• 32 KHz – 32.76 KHz: Real-time clock (RTC) circuits, watches, and low-power timing applications.
• 6 MHz: Microcontroller timing, general clock circuits, communication systems.
• 11.05 MHz: Precision timing, RF circuits, communication equipment.
• 24 MHz – 24.57 MHz: High-speed data transfer circuits, USB systems, microcontroller clock sources.