SI5351A-B12933-GM1R

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5351A-B12933-GM1R is an I2C-programmable CMOS clock generator from Skyworks Solutions. It generates up to eight non-integer-related frequencies ranging from 2.5 kHz to 200 MHz with 0 ppm synthesis error. The device operates on a core supply voltage of 2.25 V to 3.6 V and output voltages of 1.71 V to 3.6 V. It features low period jitter, typically less than 70 ps peak-to-peak, and supports configurable spread spectrum modulation. The component utilizes a MultiSynth fractional divider architecture and is housed in a compact QFN package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• I2C programmable configuration for generating any frequency up to 200 MHz
• Zero ppm frequency synthesis error at each output
• Configurable spread spectrum modulation selectable per output
• Low power consumption with excellent power supply rejection ratio

Clock Generators, PLLs, Frequency Synthesizers Applications

• XO replacement in cost-sensitive designs
• Networking and communication equipment
• Servers and storage systems
• Printers, scanners, and projectors

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the factory preprogrammed configuration code 'B12933' matches the required clock frequencies before integration. Confirm that the specific ordering suffix corresponds to the intended packaging format and quantity requirements. Ensure compatibility with the host system's I2C bus voltage levels and timing constraints during the procurement phase.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this variant when a fixed, factory-defined clock configuration is preferred over user-programmable flexibility. Verify that the maximum output frequency requirement does not exceed 200 MHz. Ensure the design accommodates the necessary external crystal components, as the Si5351A relies on an external XTAL reference rather than an internal oscillator or VCXO.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5351 family of programmable clock generators. Unlike the Si5351B which includes a VCXO, the Si5351A variant relies solely on an external crystal reference. The 'GM1R' suffix indicates a specific reel packaging format, while 'B12933' denotes a unique factory preprogrammed configuration distinct from blank parts.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other Si5351A variants with different preprogrammed codes (e.g., SI5351A-Bxxxxx-GM1R) if the clock frequencies differ. For applications requiring VCXO functionality, consider the Si5351B series. Blank programmable versions like SI5351A-B-GM1R can be used if custom configuration via ClockBuilder Pro software is feasible.