SI5348A-D-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5348A-D-GMR is a network synchronizer clock and jitter cleaner manufactured by Skyworks Solutions. It integrates three independent DSPLLs within a single monolithic IC, housed in a 64-lead QFN package. The device supports an external crystal input frequency range of 48 to 54 MHz and accepts reference clocks from 5 to 250 MHz or differential clocks up to 750 MHz. Output frequencies are configurable from 1 PPS to 718.5 MHz for differential signals and up to 250 MHz for LVCMOS outputs. It operates on core voltages of 1.8 V (VDD) and 3.3 V (VDDA), with independent output supplies selectable at 3.3 V, 2.5 V, or 1.8 V. The component functions reliably across a temperature range of –40 to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Three independently configurable DSPLLs supporting SyncE, IEEE 1588, and SETS architectures
• Ultra-low jitter performance with typical values of 100 fs
• Programmable jitter attenuation bandwidth ranging from 0.001 Hz to 4 kHz per DSPLL
• Optional digitally controlled oscillator (DCO) mode providing precise timing adjustment

Clock Generators, PLLs, Frequency Synthesizers Applications

• Synchronous Ethernet (SyncE) ITU-T G.8262 EEC Option 1 & 2
• Telecom Boundary Clock (T-BC) as defined by ITU-T G.8273.2
• IEEE 1588 (PTP) slave clock synchronization
• Stratum 3/3E, G.812, G.813 network synchronization

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix 'GMR' indicates tape and reel packaging rather than tray packaging. Confirm that the 'A' grade designation matches the required frequency range specifications. Ensure compatibility with the intended serial interface configuration before procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when high-frequency synthesis flexibility and ultra-low jitter are required for telecom synchronization. Verify that the application requires seven output channels and five input channels. Consider the DCO feature if IEEE 1588 precision timing steering is necessary for the design.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5348 family of network synchronizers. It is designed for wireless backhaul, IP radio, and data center switch applications. The device replaces legacy SETS systems while maintaining Stratum 3/3E compliance through its advanced PLL architecture.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

SI5348A-D-GM is a compatible alternative offering identical electrical characteristics but packaged in trays instead of tape and reel.