SI5322-B-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Si5322-B-GM is a pin-programmable precision clock multiplier utilizing Skyworks DSPLL technology. It accepts dual differential clock inputs from 19.44 to 707 MHz and generates two equal frequency-multiplied outputs ranging from 19.44 to 1050 MHz. The device supports selectable multiplication ratios for SONET, Ethernet, and Fibre Channel standards. It operates on a single 1.8, 2.5, or 3.3 V supply within a –40 to +85 °C temperature range. Jitter generation is as low as 0.6 ps RMS (50 kHz–80 MHz). The integrated loop filter offers programmable bandwidths from 150 kHz to 1.3 MHz.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Dual clock inputs with manual or automatic switching capabilities
• Integrated loop filter with digitally programmable bandwidth selection
• User-configurable output signal formats including LVPECL, LVDS, CML, and CMOS
• Support for ITU G.709 FEC ratios and LOS alarm output

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 line cards
• Optical modules
• Test and measurement equipment

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix 'B' against the official ordering guide, as the datasheet primarily lists 'Si5322-C-GM'. Confirm that the component is suitable for legacy designs, as the manufacturer explicitly states it is not recommended for new designs and directs users to the Si533x family for modern alternatives. Ensure compatibility with required voltage levels and signal formats.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a dedicated clock multiplier for high-speed communication systems is required without external VCXO or loop filter components. It is appropriate for applications needing precise frequency synthesis for SONET, Ethernet, or Fibre Channel rates. Consider the Si533x family if the design is new, as the Si5322 is designated for legacy support only.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The Si5322 belongs to Skyworks Solutions' third-generation DSPLL technology family. It is designed to replace multiple discrete clocking components by integrating frequency multiplication and jitter cleaning into a single package. The device simplifies timing design by eliminating the need for external loop filters and voltage-controlled oscillators.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Skyworks recommends the Si533x family of products as alternatives for new designs. Verify functional equivalence regarding input/output frequencies and signal formats before substitution.