SI5344B-B05370-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5344B-B05370-GM is a low-jitter, four-output jitter attenuator and clock multiplier from the Si5344 Rev D family. It features four inputs and four outputs housed in a 44-QFN (7x7 mm) package. The device generates any output frequency up to 350 MHz using fourth-generation DSPLL and MultiSynth technologies. Key electrical parameters include an ultra-low jitter of 90 fs rms, a differential input frequency range of 8 kHz to 750 MHz, and an LVCMOS input range of 8 kHz to 250 MHz. Output frequencies range from 100 Hz to 350 MHz for differential signals and 100 Hz to 250 MHz for LVCMOS. The core voltage is 1.8 V ±5%, with independent output supplies of 3.3 V, 2.5 V, or 1.8 V.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using fractional synthesis.
• Supports hitless input clock switching between fractionally related sources.
• Includes programmable jitter attenuation bandwidth ranging from 0.1 Hz to 4 kHz.
• Features 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

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific B05370 suffix configuration against the manufacturer's current ordering guide, as this indicates a factory preprogrammed part. Confirm availability through authorized Skyworks distributors, noting that custom preprogrammed devices may have distinct lead times compared to standard stock units.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when a fixed 350 MHz maximum output frequency is sufficient. Ensure the application requires four differential or single-ended outputs within the specified voltage ranges. Utilize ClockBuilder Pro software to define the specific frequency plan and verify that the required jitter performance aligns with the 90 fs rms specification.

Clock Generators, PLLs, Frequency Synthesizers Part Context

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

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

For higher frequency requirements, consider the SI5344A-D-GM. For fewer outputs, the SI5342B-D-GM is available. For more outputs, the SI5345B-D-GM provides ten channels. Verify pin compatibility and register settings when migrating between these variants.