SI5344D-D-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5344D-D-GMR is a low-jitter, four-output clock synthesizer and jitter attenuator. It supports any-frequency generation with output frequencies up to 350 MHz. The device features four inputs accepting differential signals from 8 kHz to 750 MHz or LVCMOS signals from 8 kHz to 250 MHz. It operates on a core voltage of 1.8 V ±5% and an auxiliary voltage of 3.3 V ±5%. The component utilizes fourth-generation DSPLL and MultiSynth technologies for jitter attenuation. It includes in-circuit programmable non-volatile memory and supports I2C/SPI interfaces. The package is a 44-QFN measuring 7x7 mm, rated for temperatures between -40°C and +85°C.

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
• Supports hitless input clock switching and glitchless on-the-fly output frequency changes
• Features digitally programmable jitter attenuation bandwidth ranging from 0.1 Hz to 4 kHz

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 tape and reel packaging requirements. Ensure the part number matches the exact Rev D specification sheet. Confirm factory preprogramming needs if custom configurations are required. Check for RoHS compliance status in the latest datasheet revision.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when four outputs are sufficient and the maximum frequency requirement does not exceed 350 MHz. Compare against Si5344A for higher frequency support up to 1028 MHz. Verify that the 44-QFN package dimensions fit the PCB layout constraints. Ensure the application requires the specific jitter attenuation characteristics provided by the DSPLL architecture.

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 internal DSPLL and MultiSynth technology as the Si5345 and Si5342 variants. The primary distinction is the reduction to four outputs compared to the ten outputs of the Si5345. It is designed for high-performance clock distribution in telecommunications and datacom infrastructure.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Si5344A-D-GM offers higher frequency support up to 1028 MHz. Si5344B-D-GM provides similar functionality but may differ in specific electrical parameters. Si5345 series devices offer more outputs but require a larger 64-QFN package.