SY89426JC

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Clock/Timing technology enables the efficient movement of digital data through a system, making possible features like the computing devices you use today, as well as other complex, high-bandwidth data applications. The SY89426JC chip is a great example of Clock/Timing technology. This document will explain both the application field, and the working principle of the SY89426JC.

Application Field

The SY89426JC is a low-skew clock synthesizer for use with clock/timing architectures. It is a low-skew clock synthesizer coupled with the ability to increase frequency range resolution and simplify high-performance clock and timing networks. The high-speed frequency Synthesizer manufactured by Samlex contains an integrated Phase-Locked Loop (PLL). It is capable of synthesizing multiple frequencies starting from a high-frequency crystal or external clock source. The SY89426JC clock Synthesizer chip provides various frequencies from 0 to 400MHz and is used in both single and multiple clock outputs.

The SY89426JC is used for generating multiple low skew clock signals for power, communication, and complex logic applications. This device is also used in high speed data streaming, high-resolution video, and packet switching. The SY89426JC’s low-skew clock synthesis capability allows it to output multiple low-jitter frequency timing signals, while its simple programming interface allows design engineers to quickly and easily customize the clock frequency division ratios and skew relationships. Its low-power consumption and wide frequency range makes it well-suited for portable applications such as handheld devices or embedded systems.

Working Principle

The SY89426JC chip uses a Phase-Locked Loop (PLL) circuit to generate precise clock and timing signals for use in clock/timing architectures. The PLL is a feedback control system which consists of three basic components, the Serially Programmable Tuning Word Counter, the Voltage-Controlled Oscillator (VCO), and the Loop Filter.

The Tuning Word Counter produces a series of high-frequency pulses that form the reference clock of the system. The VCO takes the reference clock and multiplies it to produce an output frequency that corresponds with the value of the Tuning Word Counter. The Loop Filter is the component that maintains a stable reference clock frequency. It responds to the output frequency of the VCO by adjusting the value of the Tuning Word Counter accordingly.

As the output frequency of the VCO deviates from the value of the Tuning Word Counter, the Loop Filter adjusts the value of the Tuning Word Counter automatically to make adjustments to the reference clock frequency. This assists in maintaining a stable and consistent output clock frequency that is accurately tracked to the reference clock.

In the SY89426JC, the Tuning Word Counter is programmed with a serial 16-bit Data Word, which selects from one of four binary divisions to set the desired precision frequency output. The VCO generates an output frequency with a maximum range of 400MHz and is used for dividing the output frequency in an equal ratio. The Loop Filter ensures a reference frequency is in lock with the requirement.

The SY89426JC contains additional system features such as monitor, status and configuration capabilities. It also has multiple power down functions and pin-strapping to enable user configuration.

In conclusion, the SY89426JC is a great example of Clock/Timingtechnology. It is used in multiple applications ranging from portable devices to complex logic circuits and packet switching. It has a wide frequency range and supports precise synchronous division or multiplication of frequency. The low power consumption and fast programming time make the chip an ideal choice for applications requiring precise clocking and timing.

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