SI5344B-D06466-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5344B-D06466-GMR is a low-jitter, 4-output jitter attenuator and clock multiplier from the Si5344 family. It features four inputs and four outputs housed in a 44-QFN package. 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 integrates a fourth-generation DSPLL with MultiSynth technology, offering ultra-low jitter of 90 fs rms. The component operates within a temperature range of –40 to +85 °C and utilizes I2C or SPI serial interfaces.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using fractional and integer synthesis modes.
• Integrates a fully on-chip loop filter to eliminate discrete noise coupling risks while providing digitally programmable jitter attenuation bandwidth.
• Supports hitless input clock switching between fractionally related clocks and glitchless on-the-fly output frequency changes.
• Includes in-circuit programmable non-volatile memory (NVM) 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 numerical suffix before procurement. As this is a custom part number, confirm that the internal NVM settings match the required frequency plan. Ensure compatibility with the ClockBuilder Pro software version used for initial design validation. Check current availability status as custom orders may have distinct lead times compared to standard blank prototypes.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when four independent output clocks are required with strict jitter attenuation needs below 350 MHz. The Si5344B variant is appropriate for applications not requiring the full 1028 MHz differential output range found in the 'A' series. Ensure the design accommodates the 44-QFN 7x7 mm package footprint and provides adequate thermal dissipation for the specified power consumption levels under maximum load conditions.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5344 Rev D family, which combines fourth-generation DSPLL and MultiSynth technologies. It serves as a specialized jitter cleaner and clock multiplier designed for high-performance timing applications. The device distinguishes itself through its ability to handle gapped clock inputs and provide robust holdover capabilities via integrated historical frequency data storage.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct functional replacements include other Si5344 variants such as SI5344A-Dxxxxx-GMR for higher frequency requirements or SI5344D-Bxxxxx-GMR for similar performance profiles. Cross-family substitution with Si5345 models requires accounting for the increased pin count and 64-QFN package dimensions.