SI5345B-B06263-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345B-B06263-GMR is a factory preprogrammed clock multiplier and jitter attenuator from the Si5345 family. It features four inputs and ten outputs, supporting any-frequency generation with a maximum output frequency of 350 MHz. The device utilizes fourth-generation DSPLL technology to achieve ultra-low jitter performance of 90 fs rms. It operates on a 1.8 V core voltage 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 for configuration.

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 via integrated fourth-generation DSPLL technology.
• Supports hitless input clock switching between fractionally related sources without phase offset propagation.
• Includes in-circuit programmable non-volatile memory to ensure known frequency configuration upon power-up.

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 B06263 suffix against project requirements. Confirm that the 350 MHz output limit aligns with system specifications. Ensure compatibility with the 64-QFN footprint and verify RoHS compliance status prior to integration.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this part when high channel count and low jitter are required within a 350 MHz output constraint. The Si5345B variant is suitable for applications not requiring frequencies above 350 MHz. Consider the Si5345A if higher output frequencies up to 1028 MHz are necessary. Verify input signal types match the supported differential or LVCMOS ranges.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 Rev D family of jitter attenuators. It shares architectural similarities with the Si5344 and Si5342 models but offers a higher output channel count. The 'B' designation indicates a 350 MHz maximum output frequency capability, distinguishing it from the 'A' and 'C' variants which support higher frequencies or different synthesis modes.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers: None identified in provided documentation.