SI5368B-C-GQ

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The SI5368B-C-GQ is a clock generator, PLL (phase-locked loop) and frequency synthesizer that offers a single synthesized output at a specific frequency. It is designed for embedded applications where high-reliability is of utmost importance. The SI5368B-C-GQ provides a low power solution for various embedded systems such as avionics, medical, automotive and telecom/data communications.

The SI5368B-C-GQ offers 8 different input clock options for PLL or free-running applications. The primary inputs are low-frequency references from crystal oscillators (XO) or clock inputs from external clocks. On-chip phase detect logic compares the output phase to the phase of the reference clock and the necessary corrections are made to keep the output in phase with the reference. The device is also capable of synchronized triggering, which allows one instance of the SI5368B-C-GQ on one circuit board to be locked and actively synchronized with another SI5368B-C-GQ on the same circuit board, or across a common data bus. The SI5368B-C-GQ supports Multiple Reference Clock Selection, which allows the user to switch between difference clock sources, allowing the output frequency to be changed without loop degradation.

The SI5368B-C-GQ features a Punch-Through Null Frequency Multiplier (PTN) that allows the synthesizer to drive frequencies beyond the 600MHz range. The PTN can be programmed to by pass the PLL for a single clocking frequency or can be used as part of a frequency hopping system. This is key for high-bandwidth and multi-frequency embedded applications.

The on-chip VCO (voltage controlled oscillator) options range from 2400MHz to 2800MHz, which offers wide flexibility for various functions. The on-chip VCO and input divider can be programmed to create any desired frequency in the output range (200MHz-1440MHz). The built-in fractional-N frequency synthesizer can generate resolutions as low as 0.0125Hz. The SI5368B-C-GQ is also equipped with on-chip spread spectrum modulation, allowing operation substantially lower EMI (electromagnetic interference).

The SI5368B-C-GQ offers a variety of output options, including differential and single-ended outputs (LVPECL, LVDS and HCSL). And with its dual-chip layout (inputs and outputs are separate chips), the frequency tweaking process is quicker and simpler. The SI5368B-C-GQ also features a variety of on-chip features that allow for further customization, including an output channel trimming and an integrated, self-calibrated crystal oscillator.

The SI5368B-C-GQ also offers a simple, yet robust 2.5V/3.3V CMOS power supply that makes it ideal for embedded systems. The device has a very low power consumption (1mW typical), and is designed for use in extreme environmental conditions. It can also be used in high-radiation environments, with an accelerated life-cycle testing option available.

In conclusion, the SI5368B-C-GQ is an ideal choice for embedded applications where high-reliability, low power and wide frequency tuning range are needed. It is a versatile and robust solution for clock generator, PLL and frequency synthesizer needs.

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