SI5345D-B03790-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5345D-B03790-GMR is a jitter attenuating clock multiplier from the Si5345 family, featuring four inputs and ten outputs in a 64-QFN package. It supports any-frequency synthesis with output ranges up to 350 MHz for differential signals and 250 MHz for LVCMOS. The device integrates a fourth-generation DSPLL and MultiSynth technology, offering ultra-low jitter of 90 fs rms. It operates on core voltages of VDD at 1.8 V ±5% and VDDA at 3.3 V ±5%, functioning within a temperature range of –40 to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using fractional and integer synthesis modes.
• Integrates a fully on-chip loop filter with digitally programmable jitter attenuation bandwidth ranging from 0.1 Hz to 4 kHz.
• Supports hitless input clock switching between fractionally related clocks and glitchless on-the-fly output frequency changes.
• Includes in-circuit programmable non-volatile memory (NVM) to ensure 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 factory preprogrammed configuration associated with the numerical suffix B03790, as this part number represents a custom device with a unique frequency plan assigned by Skyworks. Confirm that the ordering suffix indicates tape and reel packaging if required for automated assembly, and validate RoHS-6 compliance status against the latest datasheet revision.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the SI5345D variant specifically when the application requires output frequencies limited to a maximum of 350 MHz. Ensure the design accommodates the 64-QFN 9x9 mm package dimensions and provides appropriate termination for the selected differential or single-ended input/output signal formats. Utilize ClockBuilder Pro software to define the precise frequency plan and NVM settings.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345 Rev D family of jitter attenuators. The 'D' designation identifies it as a member supporting output frequencies up to 350 MHz, distinct from the 'A' and 'C' variants which support higher frequencies or integer-only synthesis. The 'GMR' suffix typically denotes a tape and reel packaging option for surface-mount assembly.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct functional replacements within the same package include other Si5345D variants such as SI5345D-Bxxxxx-GMR, provided the specific preprogrammed frequency plan matches the application requirements. Cross-family substitution with Si5344 or Si5342 models is not recommended due to differences in output count and package size.