SY87701LHI

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The SY87701LHI is a device that provides quite a wide range of useful timing functions such as programmable frequency division, programmable pulse width division, and programmable division ratio of high-speed clock signals both digital and analog. This integrated device contains two basic functions: Frequency Division Logic (FDL) and Delay-Lock-Loop (DLL). This wide range of features allows the SY87701LHI to be used in many applications such as frequency division and synchronization of analog and digital signals in a variety of media.

In terms of frequency division application of the SY87701LHI, the input signal source can be a variety of sources including a high speed crystal oscillator (HCSO) or local oscillator (LO). The input signal source can also be an analog signal or a baseband voltage signal. The FDL feature of the SY87701LHI can be used to divide the frequency of the input signal source by a predetermined division ratio (d) and the signal is then output to the digital output. Alternatively, the division ratio (d) can be used to generate a digital signal with a frequency that is an exact multiple of the signal source frequency.

Another application of the SY87701LHI is Synchronization. The frequency division capability of the SY87701LHI can be used to synchronize and match the frequency of two signals with different frequencies. The integrated Delay-Lock-Loop (DLL) feature enables the SY87701LHI to lock to and maintain precise synchronization between two signals. The DLL also allows for precise phase adjustment between signals, thus allowing for precise synchronization between the analog or digital input signals.

In terms of principle of operation, the SY87701LHI uses a variety of techniques to perform frequency division and synchronization. The frequency division function is achieved using a phase-locked loop (PLL) which is a type of feedback mechanism that uses a reference oscillator and a voltage-controlled oscillator (VCO) to generate an output signal. The VCO\'s output is compared to the input signal source, and the difference between the two is used to adjust the VCO to reach the required frequency division result. The delay-locked loop (DLL) feature of the SY87701LHI uses a similar technique to achieve precise synchronization, but the PLL is replaced with a digital delay-locked loop (DLL). This features allows the SY87701LHI to lock to the input signal and precisely adjust the phase of the signal.

In summary, the SY87701LHI is a highly useful clock/timing device that can be used in a variety of applications. It features two main features: Frequency Division Logic (FDL) and Delay-Lock-Loop (DLL). The FDL feature can be used to divide the frequency of the input signal sources by a predetermined division ratio and the DLL feature enables precise synchronization between two different signals. This makes the SY87701LHI an ideal choice for applications that require precise frequency division or synchronization between various signals.

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