SI5344B-B04820-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5344B-B04820-GM is a factory preprogrammed clock synthesizer and jitter attenuator from the Si5344 Rev D family. It features four inputs and four outputs, supporting any-frequency generation up to 350 MHz. The device utilizes fourth-generation DSPLL and MultiSynth technologies for ultra-low jitter performance of 90 fs rms. It operates on a single 1.8 V core supply and includes in-circuit programmable non-volatile memory. The component is housed in a 44-QFN package measuring 7x7 mm.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using fractional synthesis
• Integrates fourth-generation DSPLL and MultiSynth technologies for high-performance jitter attenuation
• Supports free-run, synchronous, and holdover modes with automatic or manual input clock switching
• Features fully integrated loop filter and digitally programmable jitter attenuation bandwidth

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 configuration associated with the B04820 suffix against Skyworks documentation. Factory preprogrammed devices are assigned unique numerical sequences representing the preprogrammed configuration. Confirm that the required frequency plan matches the internal NVM settings, as these parameters cannot be altered after manufacturing.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this part when a fixed 350 MHz maximum output frequency is sufficient. The Si5344B variant differs from the Si5344A by its output frequency range limit. Ensure the application requires the specific factory-programmed configuration rather than a generic programmable device. Verify compatibility with LVDS, LVPECL, LVCMOS, CML, and HCSL output standards.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5344 Rev D series, which offers 4 inputs and 4 outputs in a 44-QFN package. It shares architectural similarities with the Si5345 (10 outputs) and Si5342 (2 outputs). The 'B' designation indicates a maximum output frequency of 350 MHz, distinguishing it from the 'A' variant which supports up to 1028 MHz.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Si5344A-D-GM: Supports higher output frequencies up to 1028 MHz but may require reconfiguration if the original design relied on the 350 MHz limitation.