653E18755I3T

Series:	653
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	XO (Standard)
Frequency:	187.5MHz
Function:	Enable/Disable
Output:	LVPECL
Voltage - Supply:	3.3V
Frequency Stability:	±25ppm
Operating Temperature:	-40°C ~ 85°C
Current - Supply (Max):	88mA
Ratings:	--
Mounting Type:	Surface Mount
Package / Case:	6-SMD, No Lead
Size / Dimension:	0.197" L x 0.126" W (5.00mm x 3.20mm)
Height - Seated (Max):	0.055" (1.40mm)
Current - Supply (Disable) (Max):	--

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Oscillators: 653E18755I3T Application Field and Working Principle

Oscillators are electrical circuit devices used to generate repeated electrical signals, usually in the form of waves. Commonly used oscillators include quartz crystal oscillators, ceramic resonators, and PLL (Phase Locked Loop) oscillators. The 653E18755I3T oscillator is a PLL type oscillator. In this article, the application field and the working principle of this oscillator will be discussed.The 653E18755I3T oscillator is mainly used in electronic devices, such as smart phones, tablets, computers, and other electronic equipment. It is suitable for high frequency transmission and stable signal processing. The working frequency range is from 10MHz to 75MHz. Due to its small size, low power consumption, high reliability, and good performance, it is widely used in telecommunication equipments.The working principle of the 653E18755I3T oscillator is based on the principle of LC oscillator, which is to convert electrical signals into oscillatory signals. It works in a closed loop system, with input signals into the loop and the loop driving the output. The loop consists of an amplifier, a low-pass filter, a voltage-controlled oscillator and a phase comparator. The input signal is first filtered by a low-pass filter, and then amplified by an amplifier before being fed into the phase comparator. The phase comparator compares the input signal with the signal output from the voltage-controlled oscillator. If the input signal is at the same frequency as the output signal, the output of the phase comparator stays at 0. If the frequencies are different, then the output of the phase comparator will change according to the difference in the frequencies. The output of the phase comparator is then fed into the voltage-controlled oscillator (VCO), which is the most important part of the circuit. The VCO is a voltage-controlled oscillator. It is composed of a differential amplifier, inductors and capacitors. When the input voltage changes, the oscillator frequency will also change accordingly. The oscillator frequency is adjusted by the voltage-controlled resistor.When the output of the phase comparator is 0, indicating that the input signal is at the same frequency as the output signal, the VCO circuit is in its steady state, and the oscillator output is a constant frequency signal. However, if the frequency of the input signal is different from the output frequency, the output of the phase comparator will change accordingly, and the VCO circuit can adjust the oscillator frequency automatically to match that of the input signal, thus maintain the output from the VCO at the same frequency as the input signal. As a result, a stable output frequency signal is generated.In conclusion, the 653E18755I3T oscillator is commonly used in time-critical applications. It is based on the principle of LC oscillator and can produce constant frequency signals with a adjustable frequency range from 10MHz to 75MHz. Thanks to its small size, low power consumption, high reliability, and good performance, it is proved to be efficient and is widely used in electronic equipment, such as smart phones, tablets, and computers.

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