CDC421312RGET

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The CDC421312RGET is a type of Clock/Timing device – strictly speaking, it is a Clock Generator, PLL (Phase-Locked Loop) and Frequency Synthesizer. In this article, we will discuss its application field and working principle.

Application Field

CDC421312RGET is typically found in computing and embedded systems. It is used as a clock source or clocking source for systems requiring constant throughput. Examples of this are system buses for memory and peripherals, such as DDR3 and DDR4 memory, USB ports, PCIe connections and so on. It is also used in several other applications such as data transmission, audio/video streaming, and test and measurement.

CDC421312RGET is an ideal device for low-power, low-jitter digital systems such as SoCs (System-on-Chip), embedded systems, AI accelerators and mobile devices. It can generate a maximum frequency of 10 MHz and has programmable core frequencies (from few KHz to few GHz).

Working Principle

The CDC421312RGET consists of three main elements – a Phase Detector, a Voltage-Controlled Oscillator (VCO) and a Frequency Divider. The Phase Detector compares the two incoming signals – one from the reference signal input and the other from the VCO – and produces a control voltage that is used to adjust the frequency of the VCO.

The VCO regulates its frequency depending on the control voltage it receives from the Phase Detector. The Frequency Divider is used to divide the output from the VCO so that the final ‘output clock’ frequency is within the desired range. The phase buffer is also used to reduce any phase jitter.

The CDC421312RGET is a programmable PLL device, meaning that it can be used for various frequencies and applications. In addition, it has built-in loop filter components that aid in frequency selection and phase noise reduction.

In conclusion, the CDC421312RGET is a versatile Clock/Timing device which can be used in a variety of applications where low-power, low-jitter clock sources are required. It combines a Phase Detector, VCO and Frequency Divider to accurately and efficiently generate clock frequencies in the desired range.

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