SI5348B-D08942-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5348B-D08942-GM is a network synchronizer and jitter attenuator from the Si5348 family, manufactured by Skyworks Solutions Inc. It integrates three independent DSPLLs within a single monolithic IC housed in a 64-lead QFN package. The device supports output frequencies up to 350 MHz with ultra-low jitter performance of 100 fs typical (12 kHz to 20 MHz). It accepts various input formats including external crystals (48-54 MHz), REF clocks (5-250 MHz), differential clocks (8 kHz-750 MHz), and LVCMOS clocks (8 kHz-250 MHz). Operating temperatures range from -40 °C to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Three independent DSPLLs support flexible SyncE/IEEE 1588 and SETS architectures
• Digitally controlled oscillator (DCO) mode provides precise timing adjustment for PTP clock steering
• TCXO/OCXO reference input determines frequency accuracy and stability during holdover
• Programmable jitter attenuation bandwidth per DSPLL allows optimization for specific 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 compatibility with required configuration parameters. Confirm that the component meets all necessary environmental compliance standards for the intended deployment environment before finalizing procurement decisions.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when Stratum 3/3E compliance and IEEE 1588 precision are required. Ensure the design accommodates the necessary external crystal and TCXO/OCXO references for optimal jitter performance and holdover stability. Verify that the serial interface configuration aligns with the system's control architecture.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5348 series of network synchronizers. It is designed for wireless backhaul, IP radio, and data center switch applications requiring both traditional and packet-based network synchronization. The device offers industry-leading footprint and power efficiency compared to discrete solutions.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Consult the official datasheet ordering guide for direct replacements. Verify pinout and electrical specifications match exactly. Factory pre-programmed variants may require specific configuration files.