SI5348B-D08942-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5348B-D08942-GMR is a network synchronizer and jitter attenuator from the Si5348 family, manufactured by Skyworks Solutions. It integrates three independent DSPLLs within a single monolithic IC to support flexible SyncE, IEEE 1588, and SETS architectures. The device features ultra-low jitter of 100 fs typical (12 kHz to 20 MHz) and supports input frequencies ranging from 8 kHz to 750 MHz for differential clocks. Output frequencies are configurable from 1 PPS to 718.5 MHz for differential outputs and up to 250 MHz for LVCMOS. It operates on core voltages of 1.8 V and 3.3 V, housed in a 64-lead 9x9 QFN package with an operating temperature range of –40 to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Three independent DSPLLs supporting flexible SyncE/IEEE 1588 and SETS architectures
• Digitally controlled oscillator (DCO) mode providing precise timing adjustment for 1588 clock steering
• Highly configurable output drivers including LVDS, LVPECL, LVCMOS, HCSL, and CML formats
• 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 documentation to ensure correct configuration and packaging options. Confirm that the factory pre-programmed sequence ID matches the required frequency plan. Check for any recent product change notifications or end-of-life announcements prior to finalizing procurement plans.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when designing systems requiring strict adherence to telecom synchronization standards such as SyncE and IEEE 1588. Ensure the external reference source meets the stability requirements for free-run and holdover modes. Verify that the available input clock formats match the supported differential and single-ended configurations.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5348 Rev D series, designed specifically for wireless backhaul, IP radio, and data center switch applications. It combines industry-leading low power consumption with a small footprint. The device allows the TCXO/OCXO reference input to determine frequency accuracy and stability independently of the internal crystal performance.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Consult the official ordering guide for compatible variants within the Si5348 family. Verify pin compatibility and electrical specifications before substituting with other models.