SI5344B-B05231-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5344B-B05231-GM is a jitter attenuator and clock multiplier from the Si5344 family, manufactured by Skyworks Solutions. It features four inputs and four outputs housed in a 44-QFN package measuring 7x7 mm. The device supports differential input frequencies from 8 kHz to 750 MHz and LVCMOS inputs up to 250 MHz. Output frequencies range from 100 Hz to 350 MHz for differential formats and up to 250 MHz for LVCMOS. It utilizes fourth-generation DSPLL technology to achieve ultra-low jitter of 90 fs rms. The component operates within a temperature range of -40°C to +85°C and includes integrated non-volatile memory for configuration storage.

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 automatic or manual input selection with holdover capability

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 ordering suffix against the manufacturer's current documentation to confirm factory preprogramming details. Confirm package availability and lead times through authorized distributors. Ensure compliance with RoHS-6 standards and check for any product change notifications affecting this part number before procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when four differential or single-ended outputs are required with jitter attenuation capabilities. Verify that the application requires an output frequency range compatible with the B-series limit of 350 MHz. Ensure the design accommodates the 44-QFN 7x7 mm footprint and provides appropriate power supply decoupling for VDD and VDDA pins.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345/44/42 Rev D family, which integrates MultiSynth and DSPLL technologies. The Si5344 variant specifically offers four inputs and four outputs, distinguishing it from the ten-output Si5345 and two-output Si5342 models. All variants share similar functional blocks including the DSPLL loop filter and status monitoring features.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Si5344B-D-GM1 or Si5344B-D-GM2 are standard base part numbers for this series. Factory preprogrammed versions may require specific ordering codes assigned by Skyworks.