This is an electronic oscillator circuit. It uses the mechanical resonance of a vibrating crystal of piezoelectric material. And then create an electrical signal with a precise frequency. This frequency is often used to keep track of time to provide a stable clock signal.

Technical Specification:

1. Frequency Range: 12MHz
2. Load Capacitance: 18pF
3. Frequency Tolerance: ± 30ppm
4. Frequency Temperature Stability: ±50ppm
5. Resonance Resistance: 40ohms (max)
6. Shunt Capacitance: <7pF
7. Drive Level: <100µW
8. Operating Temperature Range: -20 to + 70°C
9. Operable Temperature Range: -25 to + 85°C
10. Storage Temperature Range: -55 to + 125°C
11. Insulation Resistance: 500M?

Features:

1. Accuracy, compactness
2. Low cost, low power consumption
3. High-frequency generation
4. Low phase noise
5. High Q factor
6. Automatic amplitude control and frequency drift