SI5327C-C-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5327C-C-GMR is a jitter-attenuating precision clock multiplier utilizing Skyworks' DSPLL technology. It accepts two differential input clocks from 2 kHz to 710 MHz and generates two output clocks ranging from 2 kHz to 808 MHz. The device supports single 1.8 V, 2.5 V, or 3.3 V supplies with typical operating currents of 251 mA at 622.08 MHz LVPECL. It features digitally programmable loop bandwidths between 4 Hz and 525 Hz, hitless switching compliant with GR-253-CORE, and integrated loss-of-signal/lock alarms.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any frequency translation combination across the operating range using third-generation DSPLL technology without external VCXO or loop filter components.
• Supports dual clock inputs with manually controlled hitless switching that minimizes phase transient propagation during transitions.
• Provides independent digital hold capability to maintain stable output generation when the selected reference is lost.
• Features independently programmable output signal formats including LVPECL, LVDS, CML, and CMOS.

Clock Generators, PLLs, Frequency Synthesizers Applications

• SONET/SDH OC-48/OC-192/STM-16/STM-64 line cards
• ITU G.709 and custom FEC line cards
• GbE/10GbE and 1/2/4/8/10G Fibre Channel line cards
• Synchronous Ethernet applications
• Optical modules

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and tape-and-reel specifications. Ensure the design accommodates the required supply voltage range and thermal dissipation characteristics for the QFN-36 footprint. Confirm I2C or SPI interface compatibility with the host controller before finalizing procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component for high-performance timing applications requiring sub 1 ps jitter performance and flexible frequency synthesis. The device is suitable where elimination of external analog loop filters and VCXOs is desired. Consider the available output drive formats and the requirement for hitless switching capabilities when evaluating system-level redundancy needs.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The SI5327 belongs to the Si532x family of any-frequency precision clock multipliers. It represents Skyworks Solutions' third-generation DSPLL architecture, designed to integrate frequency synthesis and jitter attenuation into a highly compact solution. This series targets telecommunications and data communication infrastructure requiring robust clock regeneration.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Consult the official Skyworks Solutions replacement guide for verified cross-reference part numbers. Do not assume functional equivalence with other silicon vendors or different model numbers within the same family without verifying pinout and electrical parameter alignment.

Clock Generators, PLLs, Frequency Synthesizers FAQ

Does the SI5327 require external components for loop filtering?

No, the device integrates the loop filter and eliminates the need for external VCXO and loop filter components through its DSPLL technology.

How does the device handle input clock loss?

It provides digital hold capability to continue generating a stable output based on historical frequency averages and triggers Loss of Signal (LOS) and Loss of Lock (LOL) alarm outputs.

Can the two clock outputs operate at different frequencies?

Yes, independent dividers are available for each output clock, allowing the generation of different frequencies from the common source.