SI5345B-B03493-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5345B-B03493-GM is a factory preprogrammed clock synthesizer and jitter attenuator from the Si5345 family. It features four inputs and ten 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 voltage and includes in-circuit programmable non-volatile memory. The component supports differential and LVCMOS input frequencies up to 750 MHz and 250 MHz respectively, with output frequencies ranging from 100 Hz to 350 MHz.

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 with digitally programmable loop bandwidth.
• Supports hitless input clock switching between fractionally related sources.
• Includes in-circuit programmable non-volatile memory for known power-up configuration.

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 preprogrammed configuration associated with the B03493 suffix against project requirements. Confirm that the 350 MHz maximum output frequency meets system needs. Ensure compatibility with the 64-QFN package footprint and verify RoHS compliance status prior to ordering.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this part when a fixed, preconfigured clock solution is required for Si5345 applications. The 'B' suffix indicates a 350 MHz maximum output frequency limit compared to the 'A' variant which supports up to 1028 MHz. Use ClockBuilder Pro software to generate the custom part number if a different configuration is needed.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 family of jitter attenuators. It shares the same 64-QFN package and core architecture as other Si5345 variants but differs in maximum output frequency capabilities and factory programming. It is distinct from the Si5344 (4 outputs) and Si5342 (2 outputs) models.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

SI5345B-A-GM offers higher frequency support up to 1028 MHz. SI5345B-D-GM is the generic base model requiring user programming. Verify electrical compatibility and pinout alignment before substituting.