SI5348B-B05083-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5348B-B05083-GM is a factory pre-programmed network synchronizer and jitter attenuator from the Si5348 family. It integrates three independent DSPLLs within a single monolithic IC, supporting flexible SyncE, IEEE 1588, and SETS architectures. The device features ultra-low jitter of 100 fs typ (12 kHz to 20 MHz) and meets ITU-T G.8262, G.812, G.813, and Telcordia GR-1244/GR-253 standards. It operates with a core voltage of 1.8 V ±5% and an analog supply of 3.3 V ±5%. The component supports input frequencies up to 750 MHz for differential clocks and generates output frequencies ranging from 1 PPS to 350 MHz in differential mode. It is housed in a 64-Lead 9x9 QFN package and functions within a temperature range of –40 to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates three independent DSPLLs for flexible synchronization architectures
• Supports Digitally-Controlled Oscillator (DCO) mode for precise timing adjustment
• Features programmable jitter attenuation bandwidth per DSPLL
• Includes built-in power supply filtering and status monitoring capabilities

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 configuration associated with the B05083 suffix against the official Skyworks datasheet or ClockBuilder Pro software documentation. As a custom factory pre-programmed part, ensure that the internal non-volatile memory settings match the target application requirements before integration. Confirm compatibility with existing serial interface protocols and reference clock sources.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when designing systems requiring Stratum 3/3E compliance or hybrid SyncE and IEEE 1588 synchronization. The Si5348B variant limits maximum differential output frequency to 350 MHz, which suits many telecom applications but may require the Si5348A variant for higher frequency needs. Utilize ClockBuilder Pro software to validate the pre-programmed configuration and ensure it aligns with the desired input/output frequency plans and loop bandwidth settings.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5348 Rev D product line, which combines industry-leading low jitter with high synthesis flexibility. The 'B' designation indicates the 350 MHz output frequency limit, distinguishing it from the 'A' grade version. The 'GM' suffix denotes the 64-QFN package and standard commercial temperature range. This series is designed for wireless backhaul, IP radio, and data center switch synchronization.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

SI5348B-D-GM