SI5394B-A15667-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5394B-A15667-GMR is a single PLL jitter attenuator and clock multiplier from Skyworks Solutions, belonging to the Si5394 family. It features four inputs and four outputs with an output frequency range up to 350 MHz using integer and fractional synthesis modes. The device utilizes fourth-generation DSPLL and MultiSynth technologies for ultra-low jitter performance. It supports external crystal or oscillator references and includes in-circuit programmable non-volatile memory for configuration storage.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency
• Supports enhanced hitless switching to minimize phase transients
• Includes in-circuit programmable non-volatile memory for known power-up states
• Compatible with LVDS, LVPECL, LVCMOS, CML, and HCSL output formats

Clock Generators, PLLs, Frequency Synthesizers Applications

• 56G/112G PAM4 SerDes clocking
• OTN muxponders and transponders
• 10/40/100/200/400G networking line cards
• Medical imaging systems

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix 'GMR' indicates tape and reel packaging when sourcing this component. Confirm that the factory preprogrammed configuration matches the required frequency plan, as custom part numbers are assigned by Skyworks based on ClockBuilder Pro software settings. Ensure compatibility with the intended serial interface protocols.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model for applications requiring four differential outputs with frequencies up to 350 MHz. The 'B' grade designation specifies support for both integer and fractional synthesis modes within this frequency range. Verify that the system design accommodates the required external crystal reference, as this grade does not utilize an integrated internal reference oscillator.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component is part of the Si5394 series, which provides four inputs and four outputs in a 44-QFN package. It serves as a drop-in compatible replacement for the Si5344 series. The device integrates all PLL components on-chip to eliminate noise coupling risks associated with discrete solutions, offering high integration for timing applications.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The datasheet identifies the Si5344 as a drop-in compatible predecessor. When substituting, verify that the legacy component's jitter performance meets the requirements of the target application, as the Si5394 offers improved jitter specifications.