SI5342D-B04089-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5342D-B04089-GM is a jitter attenuator and clock multiplier from the Si5342 Rev D family, manufactured by Skyworks Solutions Inc. It features four inputs and two outputs housed in a 44-QFN (7x7 mm) package. The device supports differential input frequencies from 8 kHz to 750 MHz and LVCMOS inputs up to 250 MHz. Output frequencies range from 100 Hz to 350 MHz for differential signals and up to 250 MHz for LVCMOS. It achieves ultra-low jitter of 90 fs rms and operates 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 any-frequency clock generation and jitter attenuation.
• Supports free-run, synchronous, and holdover modes with automatic or manual input clock switching.
• Features digitally programmable jitter attenuation bandwidth ranging from 0.1 Hz to 4 kHz.
• Includes in-circuit programmable non-volatile memory for known frequency configuration at 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 B04089 suffix against the official Skyworks ordering guide. Confirm that the required output frequency plan matches the stored NVM data. Ensure compatibility with the I2C/SPI interface settings used in the target system design.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a low-jitter solution with two configurable outputs is required. The Si5342D variant specifically supports integer and fractional synthesis up to 350 MHz. Use ClockBuilder Pro software to verify that the desired frequency plan is supported by the device's internal dividers and multipliers before finalizing the design.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5342 Rev D series, which offers four inputs and two outputs in a compact 44-QFN package. It shares core architecture with the Si5344 and Si5345 families but provides fewer output channels. The 'D' designation indicates support for output frequencies up to 350 MHz with both integer and fractional synthesis capabilities.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Si5342B-D-GM

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum output frequency for the Si5342D variant?

The Si5342D variant supports differential output frequencies up to 350 MHz and LVCMOS output frequencies up to 250 MHz.

How does the device handle input clock failure?

The device automatically enters holdover mode using stored historical frequency data if the selected input clock becomes invalid and no other valid inputs are available.

Is external loop filtering required?

No, the loop filter is fully integrated on-chip, eliminating the need for discrete components and reducing noise coupling risks.