SI5344B-D-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5344B-D-GMR is a low-jitter, four-output clock synthesizer and jitter attenuator. It supports any-frequency generation up to 350 MHz using fourth-generation DSPLL and MultiSynth technologies. The device features an integrated loop filter and digitally programmable jitter attenuation bandwidth. It operates on a single 1.8 V core supply (VDD) and a separate 3.3 V output supply (VDDA). Configuration is managed via I2C or SPI serial interfaces with in-circuit programmable non-volatile memory. The component is housed in a 44-QFN package measuring 7x7 mm.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency
• Ultra-low jitter performance of 90 fs rms
• Supports free-run, synchronous, and holdover modes of operation
• Features automatic and manual hitless input clock switching

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 and factory preprogramming status. Ensure compatibility with the required serial interface protocol and voltage levels before finalizing procurement. Confirm that the selected part number matches the exact frequency plan and output configuration needed for the target application design.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when four differential or single-ended outputs are required within the 350 MHz range. Verify that the system requires the specific jitter attenuation characteristics provided by the Rev D silicon revision. Ensure the design accommodates the 44-QFN footprint and provides adequate thermal dissipation for the specified power consumption levels under maximum operating conditions.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5344 family of jitter attenuators, which also includes variants like the SI5344A and SI5344D. These devices share the same physical package and general functional architecture but differ in supported frequency ranges and synthesis modes. The 'B' designation specifically indicates support for output frequencies up to 350 MHz.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers include SI5344B-B-GMR and SI5344B-D-GM.