SY89533LHZ

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SY89533LHZ is a monolithic two-input clock generator and phase-locked loop (PLL) with integrated low-noise voltage-controlled oscillator (VCO). It has been designed to meet the requirements of demanding clock frequency synthesis applications. The device is characterized by an industry best-in-class jitter of 350 femtoseconds (fs) and an operating frequency range of 1 to 125 MHz.SY89533LHZ is specifically designed for use in systems requiring low power, low jitter, low noise and excellent supply noise rejection (SNR). This makes it ideal for a wide range of applications such as high-speed clocks, radio frequency (RF) phase locked loops (PLLs), frequency synthesizers, digital phase locked loops (DPLLs), clock tree synthesis, chip-level processor and memory designs, as well as embedded controllers and microprocessors.

1. Application Fields

SY89533LHZ can be used in a variety of applications including high-speed clocking, clock tree synthesis, system timing, processor, memory and peripheral clock synthesis, and processor-based DSP designs. It is also compatible with many industry-standard bus protocols for reliable frequency synthesis in a wide range of applications. The device provides an integrated low-noise voltage-controlled oscillator (VCO) with a wide tuning range from 1 to 125 MHz, enabling a wide range of clock speeds to be generated.

In addition to its frequency synthesis capabilities, the device is suitable for clock generation applications such as timing synthesis, Ethernet clocking, and high-performance low-power clocking. The integrated low-noise VCO also provides the necessary jitter performance for very demanding applications such as radio frequency (RF) phase locked loops (PLLs) and digital phase locked loops (DPLLs) for precision timing of microprocessors and other peripheral devices. Furthermore, the SY89533LHZ provides highly integrated, low power, and low-cost clock generation solutions with excellent jitter performance.

2. Working Principle

The SY89533LHZ can be used to generate clock frequencies from 1 to 125 MHz with an output jitter of 350 femtoseconds (fs). It is a monolithic clock generator and PLL which incorporates several features to provide the necessary performance for a wide range of clock frequency synthesis applications. It has an integrated low-noise voltage-controlled oscillator (VCO) which typically provides up to +/-20% frequency tuning accuracy. The device utilizes a phased-locked loop (PLL) architecture to synthesize the desired output frequency. This allows the PLL to accurately reproduce the desired output frequency even over wide temperature variations.

The SY89533LHZ uses an analog loop filter which provides an adequate noise rejection characteristic to maintain ultra-low jitter performance. This, coupled with the integrated digital-to-analog (D/A) converter and digital-controlled oscillator (DCO), ensures the device is able to accurately generate clock frequencies. The digital section of the device is used to control the frequency and control the loop filter, allowing the output frequency to be accurately tuned and adjusted for the desired application.

The SY89533LHZ also features a very comprehensive set of programmable test features. This allows the user to measure and tune the PLL and VCO frequency response, jitter performance, and SNR to ensure optimal performance in any application. It also offers an open loop test mode which allows the user to measure the performance of the VCO without the influence of the loop filter, allowing the user to tweak and adjust the loop filter parameters. This further enables the device to be used in a wide range of applications, making it one of the most versatile clock generator and PLL devices on the market.

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