CDC421A250RGER

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The CDC421A250RGER is a type of clock generator, PLL, and frequency synthesizer. It is an in-system Low-Voltage Differential Signaling (LVDS) synthetic clock generator which provides a cost-effective clock source solution for multimedia applications. It is capable of generating a wide range of output frequencies, with a range of 0.1 MHz to 250 MHz, using a single system clock with frequency ranging from 0.33 MHz to 12 MHz.The CDC421A250RGER has a number of applications, such as graphics and audio, such as DVI and HDMI, video streaming, DDR, disk drive, and PC clock synchronization. It supports a wide range of input TTL and LVDS clock standards, including 0.33 MHz–12MHz, and provides clock output of 55-omega termination impedance. It is RoHS compliant, ensuring safety and reliability. It also offers many advantages such as low-power consumption, a wide supply voltage range, and an integrated double-data-rate clock output. It is a highly customizable solution, with on-board programmable phase-shift position, slew rate and output phase delay. It also has a phase-lock loop (PLL) optional loop filter, which allows for high-accuracy output frequency generation and improved jitter performance. To achieve this, the CDC421A250RGER utilizes a three-stage VCO-based PLL architecture. The first stage is the Frequency Synthesis Circuit, which consists of an oscillator to generate the reference clock and a Programmable Frequency Divider (PFD) to divide it. The PFD also enables fine resolution and wide frequency range to satisfy the low-frequency input requirements. The second stage is the VCO, which is driven by the output from the PFD. It converts the divided frequency into a higher frequency, which is then multiplied to generate the desired output frequency. Finally, the third stage is the loop filter, which corrects any undesired phase and frequency inaccuracies.In conclusion, the CDC421A250RGER is a versatile and versatile clock generator, PLL, and frequency synthesizer ideal for a range of multimedia applications. It provides a wide range of output frequencies, low-power consumption and a wide supply voltage range. It also offers an integrated double-data-rate clock output and an optional loop filter to improve jitter performance. In addition, its three-stage PLL architecture ensures reliability and ease of use.

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