SI5345B-B05420-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345B-B05420-GM is a factory preprogrammed clock synthesizer and jitter attenuator from the Si5345 Rev D family. It features four inputs and ten outputs, supporting integer and fractional frequency synthesis with output frequencies up to 350 MHz. The device utilizes fourth-generation DSPLL and MultiSynth technologies to achieve ultra-low jitter performance of 90 fs rms. It includes in-circuit programmable non-volatile memory for known power-up configurations and supports free-run, synchronous, and holdover modes. The component operates within a temperature range of -40°C to +85°C and is housed in a 64-QFN package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using integer and fractional synthesis
• Provides ultra-low jitter attenuation of 90 fs rms via fourth-generation DSPLL technology
• Supports hitless input clock switching between fractionally related sources
• Includes in-circuit programmable non-volatile memory for automatic configuration on power-up

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 factory preprogramming configuration associated with the B05420 suffix against the design requirements. Confirm that the standard Si5345B-D-GM base part number matches the required electrical specifications and package type before procurement. Ensure compatibility with the ClockBuilder Pro software version used for initial design validation.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this variant when a fixed, verified frequency plan is required without field programming. The 'B' designation indicates a maximum output frequency limit of 350 MHz, suitable for most standard networking applications. Verify that the 64-QFN package dimensions fit the PCB land pattern and that the thermal dissipation characteristics meet the system constraints.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 Rev D series, which combines DSPLL and MultiSynth technologies. The Si5345 model specifically offers four inputs and ten outputs in a 64-QFN package. The 'B' suffix denotes the 350 MHz output frequency capability, distinguishing it from the 'A' and 'C' variants which support higher frequencies or integer-only synthesis respectively.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

SI5345B-D-GM