IDT49FCT3805Q

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The IDT49FCT3805Q is a clock/timing circuit from Integrated Device Technology (IDT), a company specializing in designing and producing high-performance semiconductor products. It is a low-skew, low-jitter, high-speed clock buffer designed to isolate multiple clock domains. It is used to increase clock frequencies in systems where multiple clock domains are present, yet the timing between the domains must remain exceptionally accurate. The device was designed to simplify clock distribution problems, while providing the performance and flexibility needed by highly complex systems.

The IDT49FCT3805Q has three application fields. The first is as a frequency translator. It can be used to generate higher frequency clocks from an input clock source with much lower power consumption and a very low jitter profile. Second, it can be used as a jitter absorber for clock data converters (ADCs and DACs). It can be used to improve the resistor-capacitor (RC) time constants by reducing the jitter inherent in low-cost oscillators. Finally, it can be used as an isolator or fan-out where signals must be distributed to multiple high-speed clock sources while keeping the skew between the outputs very low.

The working principle of the IDT49FCT3805Q is based on the principle of phase-locked loop (PLL) technology. When a clock signal is fed into the circuit, it is first sampled by the internal samplers. The signals are then sent to a phase detector, where they are compared with one another and any discrepancies between the signals are analyzed. The signals are then sent to a voltage-controlled oscillator (VCO), which generates output clock signals at desired frequencies and the correct skew. Finally, the clock signals are sent to the output buffers, where the signals are stabilized and amplified to the appropriate level for the desired application.

The IDT49FCT3805Q is suitable for a wide range of applications, from datacom and telecom, to storage systems and embedded systems. Its low-skew, low-jitter, high-speed clock buffering capabilities provide a unique combination of features, making it an ideal solution for highly complex systems. Its ability to isolate multiple clock domains, create higher frequency clocks from a lower frequency input source, and absorb jitter in expensive clock data converters, makes it a powerful and versatile tool in a wide variety of applications.

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