SI5344B-B02922-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5344B-B02922-GM is a factory preprogrammed clock synthesizer and jitter cleaner from the Si5344 family. It features four inputs and four outputs, supporting output frequencies up to 350 MHz with integer and fractional synthesis modes. The device utilizes fourth-generation DSPLL technology for ultra-low jitter performance of 90 fs rms. It operates on a single 1.8 V core voltage (VDD) and accepts differential input frequencies ranging from 8 kHz to 750 MHz. The component is housed in a 44-QFN package measuring 7x7 mm and functions within a temperature range of -40°C to +85°C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using integer and fractional synthesis.
• Integrates fourth-generation DSPLL and MultiSynth technologies for high-performance jitter attenuation.
• Supports hitless input clock switching between fractionally related sources.
• Includes in-circuit programmable non-volatile memory for known power-up configurations.

Clock Generators, PLLs, Frequency Synthesizers Applications

• OTN muxponders and transponders
• 10/40/100 G networking line cards
• GbE/10 GbE/100 GbE Synchronous Ethernet (ITU-T G.8262)
• Carrier Ethernet switches
• SONET/SDH line cards

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific B02922 suffix configuration against the ClockBuilder Pro software or official datasheet ordering guide to ensure the preprogrammed settings match the design requirements. Confirm that the QFN-44 package dimensions align with the PCB land pattern specifications provided in the manufacturer's documentation before finalizing procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when an output frequency limit of 350 MHz is sufficient, as higher-frequency variants like the Si5344A support up to 1028 MHz. Ensure the application requires four outputs and can accommodate the 44-QFN package size. Verify that the serial interface (I2C/SPI) compatibility matches the system controller capabilities.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5344 family of jitter attenuators, which also includes the Si5342 (2 outputs) and Si5345 (10 outputs). All share the same 7x7 mm 44-QFN package and core architecture but differ in I/O count and maximum frequency ranges. The 'B' designation indicates the 350 MHz output capability variant.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Si5344A-Dxxxxx-GM: Supports higher output frequencies up to 1028 MHz.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum output frequency supported by the Si5344B?

The Si5344B supports output frequencies up to 350 MHz.

How does the device handle input clock loss?

It automatically enters holdover mode using stored historical frequency data if the selected input fails and no other valid inputs are available.

Is external loop filtering required?

No, the loop filter is fully integrated on-chip, eliminating the need for discrete components.