SI5344D-B05544-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5344D-B05544-GM is a low-jitter, 4-output clock synthesizer and jitter attenuator from Skyworks Solutions. It supports any-frequency generation with output frequencies up to 350 MHz. The device features four inputs accepting differential (8 kHz–750 MHz) or LVCMOS (8 kHz–250 MHz) signals. Outputs are configurable for LVDS, LVPECL, LVCMOS, CML, and HCSL formats. It operates on a core voltage of 1.8 V ±5% and I/O voltages of 3.3 V, 2.5 V, or 1.8 V. The component is housed in a 44-QFN package measuring 7×7 mm and functions within a temperature range of –40 °C to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Combines fourth-generation DSPLL and MultiSynth technologies for ultra-low jitter performance and any-frequency clock generation.
• Supports free-run, synchronous, and holdover modes with automatic or manual input clock switching capabilities.
• Features digitally programmable jitter attenuation bandwidth and integrated loop filter to minimize noise coupling.
• Includes in-circuit programmable non-volatile memory for 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 ordering suffix against the manufacturer's current documentation to confirm package type and tape/reel specifications. Confirm availability status as distribution channels may list limited stock or end-of-life conditions. Ensure the serial interface requirements match the system design before procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when output frequencies are required below 350 MHz. Verify that the application requires four outputs and four inputs. Check if the integer-only synthesis mode associated with the 'D' suffix variant meets the frequency plan requirements. Compare against Si5344A for higher frequency needs or Si5344B/C for different synthesis modes.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5344 Rev D family of jitter attenuators. It shares the same 44-QFN 7x7 mm package and pinout architecture as the Si5342 and other Si5344 variants. The primary distinction lies in the supported output frequency range and synthesis mode defined by the middle letter in the part number.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Si5344A-D-GM offers higher frequency support up to 1028 MHz. Si5344B-D-GM provides similar frequency ranges but may differ in synthesis capabilities. Si5344C-D-GM supports high frequencies with integer-only synthesis. Verify pin compatibility and software configuration migration when substituting.