SI5345B-B05860-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345B-B05860-GMR is a factory preprogrammed jitter attenuator and clock multiplier from the Si5345 family. It features four inputs and ten outputs, supporting fractional frequency synthesis with output frequencies up to 350 MHz. The device integrates fourth-generation DSPLL and MultiSynth technologies for ultra-low jitter performance of 90 fs rms. It operates on a 1.8 V core voltage and a 3.3 V analog supply within a temperature range of -40°C to +85°C. Configuration is managed via I2C or SPI serial interfaces, utilizing in-circuit programmable non-volatile memory.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using fractional synthesis technology
• Integrates fourth-generation DSPLL and MultiSynth architectures for high-performance jitter attenuation
• Supports hitless input switching between fractionally related clocks without phase offset propagation
• Includes in-circuit programmable non-volatile memory for reliable 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 B05860 suffix against project requirements. Confirm that the 350 MHz maximum output frequency aligns with system needs. Ensure compatibility with the 64-QFN package dimensions and thermal specifications during PCB layout review.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when fractional synthesis is required alongside low jitter performance below 350 MHz. The Si5345A variant supports higher frequencies up to 1028 MHz but may not be necessary if bandwidth constraints exist. Verify that the 10-output count matches the design topology compared to the 4-output Si5344.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345/44/42 Rev D family of jitter attenuators. It shares the same functional architecture as the Si5345A-D-GMR but is restricted to a 350 MHz output frequency range. The part utilizes the standard Skyworks ordering format where the numerical suffix denotes the unique preprogrammed configuration.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

SI5345B-D-GM