This part is a kind of semiconductor called NCT050C.
Function of this product has (NCT Series) Crystal Clock Oscillator.
Manufacturers : SaRonix
Image and pinout :
Some of the text within the PDF file :
SaRonix Crystal Clock Oscillator Technical Data Frequency Range: Frequency Stability: 4.0001 MHz to 66.6667 MHz ±25, ±50 or ±100 ppm over all conditions: calibration tolerance, operating temperature, input voltage change, load change, aging, shock and vibration. 5V, True TTL NCT Series Temperature Range: Operating: Storage: Supply Voltage: Supply Current: 4+ MHz to 20 MHz: 20+ to 66.6667 MHz: ACTUAL SIZE 0°C to +70°C or -40 to +85°C(limited frequencies) -55°C to +125°C +5 VDC ±10% Max @ 25°C 30mA 65mA Max over Temperature 40mA 70mA TTL Output: Symmetry: Rise & Fall Times: 0 Level: 1 Level: Load: Mechanical: Shock: Solderability: Terminal Strength: Vibration: Solvent Resistance: Resistance to Soldering Heat: Environmental: Gross Leak Test: Fine Leak Test: [ ... ]