SI5351A-B05268-GTR

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The SI5351A-B05268-GTR is a clock generator and phase-locked loop (PLL) frequency synthesizer from Silicon Labs. It is designed to produce low jitter, high frequency output clocks from a low cost,tiny 2×2 mm20-lead QFN package. With integrated multipliers, fractional-N synthesis and an optional spread spectrum input for EMI reduction, this device is ideal for a wide range of applications. In this article, we\'ll discuss the application fields and working principles of the SI5351A-B05268-GTR.

Application Fields

The SI5351A-B05268-GTR is a versatile device that can be used in a wide range of applications. It can be used in industrial automation, medical equipment, communications, aerospace, defense and instrumentation. It is particularly well suited for use in high end systems requiring both functions of a frequency synthesizer and a general-purpose PLL.

It can also serve as a general-purpose clock source in embedded applications. By using the device as a clocking solution for digital signal processor (DSP), microcontrollers, VGA/LCD controllers or other devices, designers can reduce their bill of materials and simplify the layout to a great extent.

In digital communication systems, the SI5351A-B05268-GTR can provide a low jitter clock to different clocks rate. It can also be used as a fan-out buffer in multi-channel applications such as T1/E1, OCx, SONET/SDH and IBIS clock requirement. With its integrated EMI reduction feature, frequency hopping and spread spectrum modulation, it can deliver superior performance in EMI-sensitive applications.

Working Principle

The working principle of the SI5351A-B05268-GTR relies on a patented architecture for organizing its internal logic blocks. This architecture allows for a wide range of functions and features to be implemented in very small device footprints. It contains an on-chip high-performance PLL, an intelligently asserted enable output, and configurable divider, clock multiplexer, and spread-spectrum features.

The device utilizes SiTime patented MultiSynth fractional-N architecture to generate low-jitter clocks with the best spectral content. This fractional-N synthesis helps reduce overall system cost and board space by eliminating the need for multiple external clock sources. The device requires only a minimum number of external components, such as a reference oscillator, a crystal, and somepassives, so that it can generate an output clock of any frequency.

The SI5351A-B05268-GTR operates with a 3.3V supply and requires very low power. It has an ultra-lowprofile 2mmx2mm QFN package, and supports a wide input frequency range of 32 kHz to 200 MHz and supports clock outputs of 1 to 200 MHz. The device comes with integratedprogrammable spread spectrum and clock multiplexer features, and features a patented technology for EMI reduction.

Conclusion

The SI5351A-B05268-GTR from Silicon Labs is a clock generator and PLL frequency synthesizer designed for a wide range of applications. It is suitable for industrial automation,defence, medical equipment, aerospace, communications and instrumentation applications. It utilizes SiTime patented MultiSynth fractional-N architecture, requires only a minimum number of external components, has an ultra-low power consumption and supports a wide frequency range. It also has an integrated spread-spectrum and clock multiplexer, and a patented feature for EMI reduction. This makes it an ideal device for many embedded and digital communication applications.

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