CY2542QC002T

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CY2542QC002T is a Clock/Timing device which belongs to Clock Generators, PLLs, Frequency Synthesizers family. It is widely used for frequency synthesizer applications and works as a programmable frequency reference. The CY2542QC002T accepts a voltage-controlled crystal oscillator (VCXO) input, a reference clock input, a three-state reference clock selection, and a prescale/divide ratio setting to produce an output frequency range of 25 MHz to 1800 MHz.

The CY2542QC002T is mainly composed of three parts: an analog circuit, a digital circuit, and a thermal correction circuit. The analog circuit consists of a precision voltage-controlled oscillator (VCO), loop filters, an adjustment network, a prescaler and an amplifier. The VCO is responsible for the generation of the reference clock, the loop filters are used to obtain the correct amplitude and phase response of the frequency reference, and the prescaler is used to divide the frequency reference output. The digital circuit consists of a digital lock detector, a digital-to-analog converter (DAC) and a digital-to-frequency (Df/f) converter.

The thermal correction circuit ensures that the output frequency is independent of the temperature of the device. The correction circuit senses the temperature and controls the DAC to adjust the frequency response. The arrangement of the CY2542QC002T allows these corrections to be made for both low and high temperature extremes. The output frequency accuracy of the CY2542QC002T is ±50 parts-per-million (ppm).

The CY2542QC002T can be programmed over a variety of interfaces, including USB, RS232 and SPI. It is also available in a variety of packages, such as BGA, QFN and LQFP. The CY2542QC002T is ideal for applications such as frequency synthesizers, clock and data recovery and other high frequency timing applications.

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