SI5325C-C-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5325C-C-GM is a µP-programmable precision clock multiplier from Skyworks Solutions. It accepts dual differential clock inputs ranging from 10 to 710 MHz and generates two synchronous outputs spanning 2 kHz to 945 MHz, with select frequencies reaching 1.4 GHz. The device utilizes third-generation DSPLL technology for frequency synthesis without external VCXO or loop filter components. It operates on a single 1.8 V, 2.5 V, or 3.3 V supply and features digitally programmable PLL loop bandwidths between 150 kHz and 2 MHz.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Supports dual independent clock inputs with manual or automatic switching capabilities
• Generates low jitter clock outputs with selectable signal formats including LVPECL, LVDS, CML, and CMOS
• Integrates a digitally programmable loop filter eliminating the need for external passive components
• Configurable via I2C or SPI interfaces for flexible system integration

Clock Generators, PLLs, Frequency Synthesizers Applications

• SONET/SDH OC-48/STM-16 and OC-192/STM-64 line cards
• GbE/10GbE and 1/2/4/8/10GFC line cards
• ITU G.709 and custom FEC line cards
• Optical modules
• Wireless basestations

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance and Pb-free status prior to procurement. Ensure handling procedures account for moisture sensitivity classification. Validate that the specific ordering suffix matches the required package and temperature range specifications for the target application environment.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component for applications requiring precise clock multiplication without jitter attenuation. Consider the available output drive strengths and signal format options when designing load circuits. Utilize the DSPLLsim software utility to optimize PLL divider settings and loop bandwidth selection for minimal phase noise and power consumption based on specific input-output frequency combinations.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The Si5325 belongs to Skyworks' Any-Frequency Precision Clock family, leveraging proprietary DSPLL technology. This series is designed for high-performance timing applications where flexibility in frequency translation is critical. The device integrates multiple dividers to support complex clocking architectures within telecommunications and data conversion systems.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The datasheet explicitly states the Si5325 is not recommended for new designs. For alternative solutions, refer to the Si533x family of products as indicated in the official documentation.