SI5344B-B03998-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5344B-B03998-GM is a factory preprogrammed, low-jitter clock synthesizer and jitter attenuator belonging to the Si5344 Rev D family. It features four inputs and four outputs housed in a 44-QFN package measuring 7x7 mm. The device supports output frequencies up to 350 MHz with an ultra-low jitter performance of 90 fs rms. It operates on a core voltage (VDD) of 1.8 V ±5% and an analog supply (VDDA) of 3.3 V ±5%. The component functions within a temperature range of –40 °C to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using fourth-generation DSPLL and MultiSynth technologies.
• Includes in-circuit programmable non-volatile memory (NVM) for storing configuration data, ensuring known power-up states.
• Supports free-run, synchronous, and holdover modes with automatic or manual hitless input clock switching capabilities.

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

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific B-series suffix against the manufacturer's current ordering guide to confirm the exact factory preprogrammed configuration associated with the numerical sequence. Confirm that the required evaluation board matches the Rev D specification, as hardware compatibility depends on the silicon revision. Ensure the serial interface requirements align with your system design before finalizing procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this part when a fixed, preconfigured clock solution is preferred over field-programmable alternatives. The B-series designation indicates a maximum output frequency limit of 350 MHz; verify this meets the target application bandwidth. Consider the 44-QFN package dimensions and thermal dissipation characteristics during PCB layout planning to ensure reliable operation across the specified industrial temperature range.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component is part of the Si5344 Rev D series, which integrates fourth-generation DSPLL technology. It serves as a jitter attenuator and clock multiplier designed for high-performance synchronization. The device utilizes MultiSynth dividers to generate integer or fractionally related output frequencies, providing flexibility for various networking and telecommunications standards.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The Si5344A-D-GM offers a higher frequency range up to 1028 MHz but requires reconfiguration if used as a substitute. The Si5344C-D-GM provides integer-only synthesis up to 1028 MHz. Verify that the electrical specifications and pinout remain compatible with the existing design when considering these family members.