SI5345B-B04064-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345B-B04064-GMR is a factory preprogrammed jitter attenuator and clock multiplier from the Si5345 family. It features four inputs and ten outputs, supporting any-frequency generation with an output range up to 350 MHz. The device utilizes fourth-generation DSPLL and MultiSynth technologies to achieve ultra-low jitter of 90 fs rms. It operates on a 1.8 V core voltage and 3.3 V analog supply, housed in a 64-QFN package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using fractional synthesis
• Provides ultra-low jitter performance of 90 fs rms for high-speed data applications
• Supports hitless input switching between fractionally related clock sources
• Includes 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
• SONET/SDH line cards

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific B04064 suffix configuration against the ClockBuilder Pro software or Skyworks documentation to ensure the preprogrammed settings match the design requirements. Confirm that the GMR suffix indicates tape and reel packaging if required by the assembly process.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this part when a fixed, factory-configured solution is preferred over field-programmable devices. Ensure the 350 MHz maximum output frequency meets system needs, as higher frequency variants exist within the Si5345 family. Verify compatibility with the required input clock formats and synchronization modes.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 series of jitter attenuators. The 'B' designation indicates a maximum output frequency of 350 MHz, distinguishing it from the 'A' variant which supports frequencies up to 1028 MHz. The 'D' in the base model denotes the Rev D datasheet revision.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

SI5345B-D-GM

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the difference between the SI5345B and SI5345A models?

The SI5345B supports output frequencies up to 350 MHz, whereas the SI5345A supports frequencies up to 1028 MHz.

How does the device handle input clock loss?

The device enters holdover mode using stored historical frequency data when the selected input clock becomes invalid, maintaining output stability until a valid input is restored.

Can the device switch between inputs without glitches?

Yes, it supports hitless switching for fractionally related inputs and glitchless switching for inputs with frequency differences up to ±500 ppm.