SI5350A-B12246-GM1R

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5350A-B12246-GM1R is a factory-programmable, any-frequency CMOS clock generator featuring the MultiSynth architecture. It generates up to four non-integer-related frequencies from 2.5 kHz to 200 MHz with 0 ppm error using a 25 or 27 MHz crystal reference. The device operates on core and output supply voltages of 1.8 V, 2.5 V, or 3.3 V, drawing approximately 20 mA at 1.8 V. It provides low period jitter under 70 ps typical and supports configurable spread spectrum for EMI reduction. Packaged in a 16-QFN (3x3 mm) format, it includes user-configurable control pins for power down, frequency select, and output enable functions.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates multiple independent, non-integer-related frequencies with zero phase error
• Supports glitchless frequency transitions via selectable pin control
• Configurable spread spectrum modulation reduces electromagnetic interference
• Integrated internal load capacitors eliminate external crystal components

Clock Generators, PLLs, Frequency Synthesizers Applications

• HDTV and set-top boxes
• Audio/video equipment and gaming consoles
• Printers, scanners, and projectors
• Residential gateways and networking hardware

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific factory-programmed configuration against the datasheet before integration. Confirm that the 16-QFN package dimensions match the target PCB footprint. Ensure the required voltage levels align with the system's power rails. Check availability status as factory-programmed parts may have limited stock.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when four distinct clock outputs are required within a compact form factor. Verify that the application requires pin-controlled features such as frequency selection or spread spectrum disabling. Ensure the design utilizes a 25 MHz or 27 MHz crystal reference compatible with the internal load capacitance settings.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5350 family of programmable clock generators. It serves as a direct replacement for multiple discrete crystals and oscillators, simplifying board layouts. The 'GM1' suffix indicates a 16-QFN package with four outputs, distinguishing it from the three-output MSOP and eight-output QFN variants.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other Si5350A variants with different output counts or packages, such as the 10-MSOP or 20-QFN versions. Cross-family substitution with Si5351 models requires I2C interface compatibility checks.