638E156H5C3T

Frequency Stability:	±25ppm
Current - Supply (Disable) (Max):	--
Height - Seated (Max):	0.079" (2.00mm)
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):	88mA
Operating Temperature:	-20°C ~ 70°C
Series:	638
Voltage - Supply:	3.3V
Output:	LVPECL
Function:	Enable/Disable
Frequency:	156.257812MHz
Type:	XO (Standard)
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Oscillators – 638E156H5C3T Application Field and Working Principle

Oscillators are electrical circuits that generate an alternating current by repetitively connecting and disconnecting an energy source or load. Most oscillators have a frequency control and an oscillation frequency range. They are used in a variety of applications, from RF electronics and communications to industrial control, medical equipment and military or aerospace applications.Oscillators are typically categorized according to the type of waveform produced, such as sine wave, triangular wave or square wave oscillators. In many cases, they are also categorized according to output frequency, such as very low frequency (VLF) oscillators, low frequency (LF) oscillators, and high frequency (HF) oscillators.In the case of the 638E156H5C3T, it is a very high frequency oscillator, capable of producing an output frequency in the range of 28.1 MHz to 30.6 MHz. It allows the user to vary the output frequency by controlling the input voltage through an adjustable voltage tuning control.The 638E156H5C3T is an example of a voltage controlled oscillator (VCO), where the output frequency is determined by the value of the voltage applied at the input. It is constructed using a combination of active and passive components and operates by functioning with a cross-coupled inverter stage to produce an amplified, high-voltage sinusoidal waveform.In this type of circuit arrangement, the voltage applied at the input creates a current in the rectangular loop of the circuit, which, when exceeds a certain threshold value, causes the circuit to switch states and start oscillating. This oscillation is then monitored and adjusted using an adjustable capacitor and resistor to produce the required sinusoidal output waveform.Due to its high frequency and variable frequency output, the 638E156H5C3T is suited for use in high-speed digital switching systems and communication systems such as satellite radio, mobile phones and digital television. It is also suitable for sensitive applications such as sonar and radar, where the frequency can be precisely adjusted to the target frequency.Further advantages of the 638E156H5C3T include its low power consumption and low total harmonic distortion. Additionally, it is capable of operating at temperatures as low as -55°C, which makes it suitable for use in extreme environment applications.Overall, the 638E156H5C3T oscillator offers a wide range of features and is suitable for numerous applications as a high frequency source. It is capable of producing an adjustable output frequency with very low distortion, as well as providing excellent temperature performance, making it an ideal choice for high-speed digital switching systems, communication systems, and other applications requiring an adjustable frequency source.

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