SI5391B-A15730-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5391B-A15730-GMR is a factory pre-programmed ultra low-jitter clock generator from Skyworks Solutions. It features 4 inputs and 12 outputs housed in a 64-QFN package. The device synthesizes any output frequency up to 350 MHz from any input frequency using MultiSynth technology. It delivers sub-100 fs RMS phase jitter, specifically 75 fs in integer mode. Operating temperatures range from -40°C to +85°C. Power supplies include VDD at 1.8 V ±5% and VDDA at 3.3 V ±5%. Outputs support LVDS, LVPECL, LVCMOS, CML, and HCSL formats.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency
• Ultra-low phase jitter performance with precision calibration options
• Highly configurable outputs compatible with multiple signal formats

Clock Generators, PLLs, Frequency Synthesizers Applications

• 100/200/400G switches
• 56G/112G PAM4 SerDes reference clocks
• Clock tree generation replacing XOs, buffers, signal format translators
• Clocking for FPGAs, processors, memory
• Ethernet switches/routers

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific configuration sequence '15730' matches the required clock plan before procurement. Confirm that the GMR suffix indicates tape and reel packaging suitable for automated assembly processes. Ensure the host system supports the necessary serial interface protocols for potential runtime reconfiguration if NVM programming is insufficient.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when fixed factory pre-programming is preferred over field configuration via I2C or SPI. The B-grade designation limits maximum output frequency to 350 MHz; verify this meets design requirements. Consider the A-grade variant if frequencies exceeding 350 MHz are needed. Ensure the application environment stays within the specified -40 to +85 °C operating temperature range.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5391 family of any-frequency, any-output clock generators. It utilizes proprietary MultiSynth fractional synthesizer technology combined with a wide-band PLL. The device integrates non-volatile memory for storing custom configurations, allowing it to replace multiple discrete oscillators and buffers with a single integrated circuit solution.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Si5391A-A15730-GMR provides similar functionality but supports higher output frequencies up to 1028 MHz.