SI5348A-E-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5348A-E-GMR is a network synchronizer clock featuring three independent DSPLLs in a 64-lead 9x9 QFN package. It supports SyncE and IEEE 1588 PTP architectures with ultra-low jitter of 95 fs typ (12 kHz to 20 MHz). Input frequency ranges include external crystals from 48–54 MHz, REF clocks from 5–250 MHz, differential clocks from 8 kHz–750 MHz, and LVCMOS clocks from 8 kHz–250 MHz. Output frequencies reach up to 718.5 MHz for differential outputs and 250 MHz for LVCMOS. The device operates on core voltages of VDD at 1.8 V ±5% and VDDA at 3.3 V ±5%, with independent output supplies selectable at 3.3 V, 2.5 V, or 1.8 V. Operating temperature spans –40 to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Three independent DSPLLs support flexible SyncE/IEEE 1588 and SETS architectures within a single monolithic IC.
• Enhanced hitless switching minimizes output phase transients during input frequency changes.
• Digitally controlled oscillator (DCO) mode provides precise timing adjustment for 1588 (PTP) clock steering applications.
• Programmable jitter attenuation bandwidth per DSPLL allows optimization for specific synchronization standards.

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 against the manufacturer's current documentation to ensure correct configuration. Confirm that the device matches the required Rev E specifications. Check for factory pre-programmed availability if custom configurations are needed via ClockBuilder Pro software. Ensure compatibility with the intended serial interface protocols.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when designing systems requiring simultaneous SyncE and IEEE 1588 synchronization. Verify that the application benefits from the three independent DSPLLs for separate clock domains. Consider the DCO mode requirements for precise PTP steering. Ensure the design accommodates the necessary external crystal and reference clock inputs for optimal performance.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The SI5348A-E-GMR belongs to the Si5348 family of network synchronizers designed for telecom and data center applications. It replaces multiple discrete clock components with a single highly integrated solution. The device supports various synchronization standards including ITU-T and Telcordia specifications, making it suitable for wireless backhaul and IP radio systems.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers: None identified in verified source material.