SI5397C-A-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5397C-A-GMR is a jitter-attenuating clock multiplier featuring four independent Dual-Source Phase-Locked Loops (DSPLLs). It provides eight output clocks with differential interfaces supporting frequencies up to 720 MHz. The device accepts external crystal or oscillator references and operates within a supply voltage range of 1.8 V ± 5% for the core and 3.3 V ± 5% for analog sections. It supports input frequencies from 8 kHz to 750 MHz differentially, with an operating temperature range of –40 °C to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates four independent DSPLLs enabling synchronization to multiple time domains
• Supports any-frequency conversion between inputs and outputs via flexible crosspoint routing
• Features enhanced hitless switching to minimize output phase transients during input changes
• 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 systems
• Synchronous Ethernet (ITU-T G.8262)
• 10/25/100G Carrier Ethernet switches
• Broadcast video equipment

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against official Skyworks documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with required reference components such as external crystals or oscillators. Confirm that the selected grade meets the environmental and electrical requirements for the target application design.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when four independent PLL domains are required for complex timing architectures. Verify that the external reference frequency falls within the supported range for optimal jitter performance. Consider the board space constraints associated with the 64-QFN package and ensure adequate thermal management for the power dissipation characteristics.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5397 family of high-performance jitter attenuators. It serves as a drop-in replacement for previous generation devices like the Si5347. The 'C' designation indicates it utilizes an external crystal reference rather than an integrated one, distinguishing it from the J/K/L/M grades.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The datasheet identifies the Si5347 as a compatible predecessor. Verify pinout and register compatibility before substitution. Other family members like the Si5396 offer fewer PLLs and outputs.