- What it is
A three‑pin device (two resonator pins + common ground) made of piezoelectric ceramic. - Function
Like a crystal, you still need an external inverter/amplifier, but resonators often have built‑in load capacitors. - Key specs
- Frequency tolerance: typically ±0.5 % (5 000 ppm)
- Stability: a few hundred ppm/°C
- Aging: several ppm/year (worse than quartz)