SI5345A-B03926-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5345A-B03926-GM is a factory preprogrammed clock multiplier and jitter attenuator from the Si5345 family. It features four inputs and ten outputs, supporting integer and fractional synthesis modes with output frequencies up to 1028 MHz. The device utilizes fourth-generation DSPLL and MultiSynth technologies to achieve ultra-low jitter performance of 90 fs rms. It operates within a temperature range of -40°C to +85°C and is housed in a 64-QFN package measuring 9x9 mm.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using integer and fractional synthesis.
• Features ultra-low jitter performance of 90 fs rms for high-speed data applications.
• Supports hitless input clock switching between fractionally related clocks.
• Includes in-circuit programmable non-volatile memory for known power-up configurations.

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 the exact factory preprogrammed configuration. As this is a custom part number assigned by Skyworks, standard generic replacements may not function identically without reprogramming. Ensure compatibility with the ClockBuilder Pro software version used during initial configuration.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the SI5345A variant when output frequencies exceeding 350 MHz are required, as other family members like the SI5345B are limited to 350 MHz. This model supports both integer and fractional synthesis modes. Verify that the application requires the 10-output configuration provided by the Si5345 series rather than the 4-output Si5344 or 2-output Si5342 variants.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345/44/42 Rev D family of jitter attenuators. The 'A' designation indicates support for output frequencies up to 1028 MHz with integer and fractional synthesis. The 'B03926' sequence represents a unique numerical identifier for the factory preprogrammed configuration stored in the internal non-volatile memory.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Generic replacement parts must match the Si5345A-D-GM base specification. However, due to the custom preprogrammed nature of the B03926 suffix, functional equivalence requires either reprogramming a new unit via ClockBuilder Pro or sourcing an identical factory-preprogrammed part from authorized distributors.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum output frequency supported by the SI5345A?

The SI5345A supports differential output frequencies ranging from 100 Hz to 1028 MHz.

How does the device handle input clock switching?

It supports manual or automatic input selection with features for hitless switching between fractionally related clocks and glitchless switching between asynchronous clocks.

Is external programming required for this part number?

No, the 'B03926' suffix indicates a factory preprogrammed device that powers up with a known frequency configuration stored in its non-volatile memory.