550QJ921M500DG

Frequency Stability:	±20ppm
Current - Supply (Disable) (Max):	75mA
Height - Seated (Max):	0.071" (1.80mm)
Size / Dimension:	0.276" L x 0.197" W (7.00mm x 5.00mm)
Package / Case:	6-SMD, No Lead
Mounting Type:	Surface Mount
Ratings:	--
Current - Supply (Max):	117mA
Operating Temperature:	-40°C ~ 85°C
Absolute Pull Range (APR):	±130ppm
Series:	Si550
Voltage - Supply:	3.3V
Output:	CML
Function:	Enable/Disable
Frequency:	921.5MHz
Type:	VCXO
Base Resonator:	Crystal
Part Status:	Active
Packaging:	Strip

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Oscillators: 550QJ921M500DG Application Field and Working Principle

Oscillators, such as the 550QJ921M500DG, are electronic circuits that generate continuous waves or periodic signals in the form of an oscillation, such as sine waves. Oscillators find application in many electronic applications including in radio and television broadcasting circuits, computer-based systems, cellular phones, military radars, amplifiers, and many other electronic circuits. The 555QJ921M500DG is a type of crystal-controlled oscillator, which is characterized by the use of a quartz crystal as the timing element. The crystal is used to accurately tune the oscillator frequency to a desired value. This permits the oscillator to generate specific and precise frequencies with minimal frequency drift. The accuracy of this oscillator is further enhanced by the use of a temperature-compensating (or “thermal compensation”) circuit. The functioning of the 550QJ921M500DG oscillator is controlled by three basic stages. The first stage is the crystal, which produces a frequency that is determined by the size and shape of the crystal. The second stage is an amplifier, which magnifies the crystal output to increase the oscillation signal. The third stage is a filter, which cleans up the oscillation signal to produce a waveform with fewer harmonic frequencies. The oscillator output can be varied by varying the crystal frequency. This can be done either by changing the frequency of the external oscillator driving the crystal, or by changing the driving voltage of the crystal. In addition, the frequency of the oscillator can be varied by changing the capacitor connected to the crystal. The accuracy and stability of the oscillator can be further improved by the use of a frequency trimming circuit. This circuit uses an adjustable capacitor to modify the oscillation frequency. The output frequency of the oscillator can also be changed by changing the voltage of the crystal, which is known as frequency “pulling.”The application field of the 550QJ921M500DG oscillator includes communication systems, computers, digital clocks, remote-control systems, digital musical instruments, audio amplifiers, and antenna tracking systems, among others. It is also used in systems that require accurate and stable frequencies. In summary, the 550QJ921M500DG oscillator is an electronic circuit that uses a quartz crystal as its timing element. The crystal modulates the oscillator frequency and the output is amplified, filtered, and trimmed through the use of additional circuitry to produce a more accurate and stable signal. The oscillator finds application in many electronic systems requiring accurate and stable frequencies.

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