SI5344B-B03388-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5344B-B03388-GMR is a jitter attenuator and clock multiplier from the Si5344 family, housed in a 44-QFN 7x7 mm package. It features four inputs and four outputs, supporting differential frequencies up to 350 MHz and LVCMOS up to 250 MHz. The device utilizes fourth-generation DSPLL technology for ultra-low jitter performance of 90 fs rms. It supports integer and fractional synthesis modes with digitally programmable loop bandwidth ranging from 0.1 Hz to 4 kHz. Power requirements include a core voltage (VDD) of 1.8 V ±5% and an analog supply (VDDA) of 3.3 V ±5%. Operating temperature range is -40°C to +85°C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using DSPLL and MultiSynth technologies.
• Supports hitless input clock switching between fractionally related clocks without phase offset propagation.
• Includes in-circuit programmable non-volatile memory to ensure known frequency configuration upon power-up.
• Provides status monitoring for loss of signal, out-of-frequency, and loss of lock conditions.

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 ordering suffix 'GMR' indicates tape and reel packaging as per standard Skyworks conventions. Confirm that the numerical sequence 'B03388' corresponds to the factory preprogrammed configuration intended for your application. Ensure compatibility with I2C or SPI serial interface protocols during integration.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when low jitter attenuation below 350 MHz is required alongside flexible input/output configurations. The Si5344B variant specifically targets applications not requiring the full 1028 MHz differential output range of the Si5344A series. Utilize ClockBuilder Pro software to optimize loop bandwidth and verify holdover performance for SyncE compliance.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5345/44/42 Rev D family of jitter attenuators. The Si5344 model provides a balance of performance and pin count with four inputs and four outputs in a compact 44-QFN package. It shares architectural similarities with the Si5345 but offers fewer output channels, making it suitable for cost-sensitive designs requiring high-performance clocking.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Si5344A-Dxxxxx-GMR: Offers higher differential output frequency capability up to 1028 MHz compared to the 350 MHz limit of the Si5344B series. Verify if the increased frequency range is necessary for your design before substituting.