638L12503C2T

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Oscillators are essentially circuitry devices or sub circuits having the ability to generate periodically alternating waveforms. This alternating waveform can take the form of square, triangle, sine or sawtooth waves depending on the application requirements; usually, the frequency of oscillation can range from a few hertz to several gigahertz. Oscillators based on discrete components are generally referred to as RC oscillators, while those based on active devices, especially transistors, are known as transistor oscillators or T-oscillators.

The 638L12503C2T oscillator is a generic voltage-controlled crystal oscillator (VCXO) with 10 to 17 MHz frequency range, 50 fS (50 femtoseconds) frequency stability, and +3.3V supply voltage. It is an integrated circuit that is specifically designed for high performance applications that require low jitter, fast settling time, and wide tuning range for robust frequency synthesis.

The 638L12503C2T is used in many applications such as digital television, HDTV, digital radio broadcasting, audio and video recorders, navigation systems, satellite communication systems, and military applications. It is also commonly used in high-speed serial transmission, wireless communication, digital signal processing, signal conditioners, power management, and frequency synthesizers, as well as in custom oscillator designs.

The 638L12503C2T provides excellent performance, low power consumption, low noise, excellent phase noise, and low aging. It is powered by an input voltage of 3.3volts, uses XO and HCMOS logic, and also has an integrated PLL feature.

The 638L12503C2T is based on a crystal oscillator architecture and it works by establishing an oscillation frequency determined by an external quartz crystal. The crystal is attached to the system either directly or through its terminals, and it creates an alternating electric signal characterized by a specific frequency. The crystal oscillator IC then amplifies the signal in order to obtain the required frequency or period of oscillation. The frequency can also be tuned and adjusted by applying a supply voltage, which is why this type of oscillator is known as a voltage-controlled crystal oscillator.

The 638L12503C2T is comprised of the main crystal, voltage-controlled oscillator (VCO) circuit, output buffer amplifier, reference divider, loop filter, phase frequency detector, and a special loop-control circuit. The output of the crystal oscillator is supplied to the VCO input along with the voltage-controlled signal and it is then passed through the reference divider. The output of the reference divider is then supplied to the phase frequency detector, which compares the frequency of the signal with an internal reference clock signal. The result of this comparison is then supplied to the loop-control circuit, which generates a control signal that adjusts the frequency of the VCO until it is equal to the reference clock frequency. This oscillator can be easily tuned by varying the control voltage, allowing it to be adjusted for any frequency range.

The 638L12503C2T oscillator can operate over a wide frequency range and is suitable for high performance applications. It provides exceptional frequency stability, low jitter, and fast settling time, making it an ideal choice for applications such as video and audio recording, broadcast television, radio, navigation, and satellite communication. It also offers a high level of integration and power efficiency, allowing customers to easily incorporate the oscillator into their designs.

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