SI5350C-B04249-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5350C-B04249-GM is a factory-programmable CMOS clock generator from the Si5350 family, manufactured by Skyworks Solutions. It utilizes a dual PLL and MultiSynth architecture to generate up to eight non-integer-related frequencies ranging from 2.5 kHz to 200 MHz with zero ppm error. The device supports both free-running and synchronous clocks, accepting a crystal reference (25 or 27 MHz) or an external clock input (10–100 MHz). It operates on core and output supply voltages of 1.8 V, 2.5 V, or 3.3 V, featuring low period jitter typically under 70 ps peak-to-peak and configurable spread spectrum for EMI reduction.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any frequency from 2.5 kHz to 200 MHz with exact synthesis and zero ppm error
• Supports glitchless frequency changes via user-configurable control pins
• Features separate voltage supply pins for level translation between core and outputs
• Includes programmable control pins for power down, output enable, and spread spectrum

Clock Generators, PLLs, Frequency Synthesizers Applications

• HDTV, DVD/Blu-ray, and set-top box timing
• Audio/video equipment and gaming consoles
• Printers, scanners, and projectors
• Handheld instrumentation
• Residential gateways and networking/communication systems

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific factory programming configuration associated with the suffix B04249, as this determines the unique output frequencies and pin assignments. Confirm package type compatibility during sourcing, as the GM suffix indicates a QFN package variant. Ensure that the required I2C or Pin control interface matches the system design requirements for this pre-programmed device.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the SI5350C-B04249-GM when a custom, factory-defined clock solution is required without field reprogramming. This part is suitable for designs needing multiple synchronized or free-running clocks from a single component. Verify that the required output count and frequency range fall within the capabilities of the 20-QFN package version implied by the base model.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5350C series, which distinguishes itself by supporting both crystal and external clock inputs. Unlike the Si5351 series which uses I2C programming, the Si5350C is configured via pin strapping or factory programming. The 'GM' suffix denotes a specific QFN package option, while the numeric code represents the unique factory configuration file loaded at manufacture.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other factory-programmed variants within the Si5350C-Bxxxxx-GM family, provided they share the same package and pinout. Cross-family substitution with Si5351 devices requires I2C interface redesign. Verify thermal resistance values if replacing with different package types like MSOP.