SI5350A-B04986-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5350A-B04986-GMR is a factory-programmable CMOS clock generator manufactured by Skyworks Solutions. It utilizes a PLL and high-resolution fractional divider architecture to generate up to eight non-integer-related frequencies ranging from 2.5 kHz to 200 MHz with 0 ppm error. The device operates on a fixed-frequency crystal reference of 25 or 27 MHz and supports glitchless frequency changes. Key electrical parameters include a core supply voltage range of 1.71 V to 3.6 V, output buffer voltage of 1.71 V to 3.6 V, and typical period jitter below 70 ps pp. It features configurable spread spectrum, static phase offset support, and rise/fall time control.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates multiple independent, non-integer-related clock frequencies from a single crystal reference
• Supports glitchless frequency transitions and configurable spread spectrum for EMI reduction
• Features user-configurable control pins for power down, output enable, and frequency selection
• Provides separate voltage supply pins for core logic and output buffers to facilitate level translation

Clock Generators, PLLs, Frequency Synthesizers Applications

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

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific factory programming configuration associated with the B04986 suffix using ClockBuilder Pro software or official Skyworks documentation. Confirm that the package type matches the required output count, as the Si5350A family offers 3, 4, or 8 outputs depending on the housing selected. Ensure the crystal reference frequency aligns with the programmed design specifications.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when replacing multiple discrete crystals and oscillators in cost-sensitive designs. Choose the appropriate package variant based on the number of required clock outputs: 10-MSOP for three outputs, 16-QFN for four outputs, or 20-QFN for eight outputs. Verify that the application requires pin-controlled functionality rather than I2C programmability, as this model uses direct pin configuration.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5350A series of factory-programmable clock generators. It is distinct from the Si5351 series, which offers I2C programmability and additional input options like VCXO or external clock inputs. The Si5350A is designed specifically for applications requiring fixed, custom timing configurations delivered directly from the manufacturer without field reprogramming.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements must match the factory-programmed frequency plan. Equivalent parts within the Si5350A family differ primarily by package type (10-MSOP, 16-QFN, 20-QFN) and output count. Cross-family substitution with Si5351 models requires I2C interface adaptation and may not be compatible if pin-control is strictly required.