SI5348B-D07011-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5348B-D07011-GMR 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 flexible SyncE/IEEE 1588 architectures with ultra-low jitter performance of 100 fs typical (12 kHz to 20 MHz). Input frequency ranges include external crystals at 48–54 MHz, REF clocks at 5–250 MHz, differential clocks at 8 kHz–750 MHz, and LVCMOS clocks at 8 kHz–250 MHz. Output frequencies range from 1 PPS to 718.5 MHz for differential outputs and up to 250 MHz for LVCMOS outputs. Operating voltage includes VDD at 1.8 V ±5% and VDDA at 3.3 V ±5%.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Three independent DSPLLs supporting flexible SyncE, IEEE 1588, and SETS architectures.
• Ultra-low jitter performance of 100 fs typical across the 12 kHz to 20 MHz offset range.
• Digitally controlled oscillator (DCO) mode providing precise timing adjustment for 1588 clock steering applications.
• Programmable jitter attenuation bandwidth per DSPLL ranging from 0.001 Hz to 4 kHz.

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 datasheet to confirm factory pre-programmed configurations. Ensure compatibility with I2C or SPI serial interfaces for configuration. Check for moisture sensitivity levels and reflow soldering profile requirements during assembly. Confirm availability through authorized distributors as lead times may vary.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when requiring high-frequency synthesis flexibility combined with strict synchronization standards compliance. The device is suitable for wireless backhaul, IP radio, and data center switch applications. Consider the available output driver formats including LVDS, LVPECL, LVCMOS, HCSL, and CML. Verify that the required input reference sources align with the supported crystal and clock frequency ranges.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5348 series of network synchronizers designed for telecom and datacom applications. It replaces older generations like the Si5348A or generic Si5348 variants by offering enhanced jitter performance and DCO capabilities. The 'B' grade indicates specific electrical characteristics optimized for boundary clock implementations.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other Si5348B variants with different pre-programmed configurations. Cross-reference with Si5348A-D-GM if fewer PLLs are sufficient. Ensure pinout compatibility with the 64-lead QFN package when substituting.