SI5345B-B03240-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5345B-B03240-GM is a factory preprogrammed clock multiplier and jitter attenuator from the Si5345 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 technology for ultra-low jitter performance of 90 fs rms. It operates on a single 1.8 V core supply and accepts differential or LVCMOS input signals ranging from 8 kHz to 750 MHz. The component is housed in a 64-QFN package and supports I2C/SPI serial interfaces.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using integer and fractional synthesis
• Features programmable jitter attenuation bandwidth and integrated loop filter
• Supports hitless input clock switching and glitchless on-the-fly frequency changes
• 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 B03240 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 model when a fixed, preconfigured clock solution is required rather than a blank prototyping device. The B-series designation indicates a maximum output frequency limit of 350 MHz; choose A or C series variants if frequencies exceeding this threshold are necessary. Verify that the 10-output count aligns with the target design topology.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 family of low-jitter clock multipliers. It shares the same physical package and core architecture as the Si5345A-D-GM but differs in its factory-programmed frequency plan and output frequency limitations. The part number structure follows Skyworks' convention for custom preprogrammed devices within the Rev D datasheet specification.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

SI5345B-D-GM serves as the generic equivalent for manual programming. For higher frequency requirements, consider SI5345A-D-GM or SI5345C-D-GM. Direct functional replacement requires matching the specific preprogrammed frequency plan.