SI5335B-B06245-GM

Series:	*
Packaging:	Tray
Part Status:	Active
Mounting Type:	Surface Mount
Package / Case:	24-VFQFN Exposed Pad
Supplier Device Package:	24-QFN (4x4)

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SI5335B-B06245-GM clock generator

The SI5335B-B06245-GM clock generator belongs to the category of Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers. It is manufactured by Silicon Labs and it is a programmable clock generator, used for generating different frequencies for various applications. The SI5335B-B06245-GM is a low-cost, highly integrated clock generator that operates at frequencies up to 600 MHz. It can be programmed over a serial port and can generate both differential and single ended frequencies up to 600 MHz with high resolution. The output buffering architecture minimizes output skew and jitter while the low-jitter pll enables low output jitter and provides extremely low noise levels. The device is available in a space saving 24-pin (4 × 4) QFN package.The SI5335B-B06245-GM is suitable for applications such as digital video, DSL and ADSL clocks, wireless infrastructure, multichannel digital TV, broadcast Digital Video Broadcasting(DVB) systems, networking and even consumer electronics.The intelligence of the SI5335B-B06245-GM makes it powerful and flexible allowing for exceptional customization. The device includes three banks of up to five separate output strings that can be individually set in frequency, output amplitude, polarity (differential or single ended) and phase. It includes current-drive circuitry to support varying output power levels. The working principle of the SI5335B-B06245-GM is based on the output of a PLL, controllable with the serial or the Fixed Frequency Output Configuration Interface. This interface uses an external reference oscillator, which will be used as reference and input in the PLL. The external reference clock is then passed through a divide-by-N/divide-by-N+1 divider to generate the nominal frequency. This frequency is then multiplied by the internal multiplier and is phase shifted to form the desired output frequency. As a result, the output clock can be phase shifted or jittered according to the application requirements.The PLL inside the SI5335B-B06245-GM also consists of internal loop components such as the VCO, phase detector and loop filter, whose functions are to track and maintain the output frequency. The VCO is an oscillator circuit whose output frequency can be changed across a wide range. The phase detector compares the phase/frequency of the reference signal to the VCO output then generates a differential voltage signal that is proportional to the phase difference between the two signals. The loop filter then performs a low-pass filtering of the output from the phase detector to form a closed loop. The output frequency is then determined by the output of this loop filter.In conclusion, the SI5335B-B06245-GM clock generator is a highly integrated, low-cost programmable clock generator designed for applications such as digital video, DSL and ADSL, wireless infrastructure, and multichannel digital TV among others. It has the capability to generate both differential and single ended frequencies up to 600 MHz with high resolution. The working principle of the device is based on the output of a PLL, with an external reference and internal components that work together to generate the desired output frequency.

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