SI5397L-A-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5397L-A-GMR is a quad PLL jitter-attenuating clock multiplier from Skyworks Solutions, utilizing fourth-generation DSPLL technology. It features four independent any-frequency phase-locked loops and provides eight output clocks within a 64-LGA package. The device integrates an internal crystal reference to reduce board space and acoustic noise. It supports input frequencies up to 750 MHz and generates output frequencies up to 720 MHz with typical ultra-low phase jitter of 95 fs rms. Operating voltage ranges from 1.71 V to 1.89 V, with a maximum power dissipation of 1.4 W across an industrial temperature range of -40°C to +85°C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates four independent DSPLLs for flexible synchronization to multiple time domains
• Features enhanced hitless switching to minimize output phase transients during input clock changes
• Supports automatic free-run and holdover modes for continuous operation during signal loss
• Includes in-circuit programmable non-volatile memory for persistent configuration storage

Clock Generators, PLLs, Frequency Synthesizers Applications

• OTN muxponders and transponders
• 10/40/100/400GbE networking equipment
• Synchronous Ethernet (ITU-T G.8262) implementations
• 10/25/100G Carrier Ethernet switches
• Broadcast video systems

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure correct packaging and pre-programming configurations. Confirm that the integrated reference grade matches the design requirements for board space optimization. Check for moisture sensitivity levels and reflow soldering profiles prior to assembly.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when high integration and independent timing paths are required for complex clock distribution networks. The integrated reference eliminates external crystals, simplifying layout. Ensure the application benefits from the low jitter performance and flexible crosspoint routing capabilities provided by the quad PLL architecture.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5397 family of any-frequency jitter attenuators. It is designed as a drop-in replacement for previous generation devices like the Si5347. The L-grade designation specifically indicates the inclusion of an internal crystal reference, distinguishing it from external reference variants.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers include SI5397J-A-GM and SI5397K-A-GM. Verify pin compatibility and electrical specifications before substitution.