12 MHz HC-49/SMD Quartz Crystal Oscillator
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Prices updated: 13 Oct 2026
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About this product
A 12MHz quartz crystal in an HC-49/SMD enclosure, used as a timing reference for microcontrollers and digital circuits. It is specified with a load capacitance of 15–33 pF, a maximum series resistance of 100 Ω and a frequency tolerance of ±50 ppm. It suits designs that need a 12MHz clock reference in a standard surface-mount package.
Specifications
- Frequency
- 12 MHz
- Package
- HC-49/SMD
- Load capacitance (CL)
- 15–33 pF
- Max series resistance (Rs)
- 100 Ω
- Frequency tolerance
- ±50 ppm
- Temperature coefficient
- ±30 ppm
Frequently asked questions
What load capacitors should I use with it?
Choose capacitors that match the crystal's load capacitance specification (15–33 pF) and follow the oscillator circuit guidance in your microcontroller's datasheet, since the right values depend on that circuit.
What does ±50 ppm mean in practice?
It means the frequency can deviate by up to 50 parts per million. At 12 MHz that is roughly ±600 Hz, which is acceptable for most general digital timing but may not suit precise timekeeping.
