SI5345A-B05743-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5345A-B05743-GM is a 10-channel, any-frequency, any-output jitter attenuator and clock multiplier. It features four differential inputs and ten configurable outputs supporting LVDS, LVPECL, LVCMOS, CML, and HCSL formats. The device generates output frequencies ranging from 100 Hz to 1028 MHz using fractional synthesis. It operates on a 1.8 V core supply and a 3.3 V analog supply within an industrial temperature range of –40 °C to +85 °C. The component is housed in a 64-QFN package measuring 9×9 mm.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Combines fourth-generation DSPLL and MultiSynth technologies for ultra-low jitter performance.
• Supports free-run, synchronous, and holdover modes with automatic or manual input switching.
• Features digitally programmable jitter attenuation bandwidth and integrated loop filter.
• Includes in-circuit programmable non-volatile memory for known power-up configurations.

Clock Generators, PLLs, Frequency Synthesizers Applications

• OTN muxponders and transponders
• 10/40/100 G networking line cards
• GbE/10 GbE/100 GbE Synchronous Ethernet (ITU-T G.8262)
• Carrier Ethernet switches
• SONET/SDH line cards

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm factory preprogramming details. Confirm availability status as distribution channels may vary. Ensure the serial interface configuration matches the target system requirements before finalizing procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when high channel count and flexible output formats are required. The Si5345A variant supports fractional synthesis up to 1028 MHz. Use ClockBuilder Pro software for configuration. Verify that the external crystal frequency falls within the recommended 48 MHz to 54 MHz range for optimal jitter performance.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345/44/42 Rev D family of jitter attenuating clock multipliers. The Si5345 variant specifically provides four inputs and ten outputs in a 64-QFN package. It utilizes proprietary DSPLL and MultiSynth technologies to deliver precise clock generation and jitter cleaning for demanding telecommunications and datacom applications.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Si5345A-D-GM: Generic version of the same series without specific factory programming.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum output frequency supported by the Si5345A?

The Si5345A supports differential output frequencies up to 1028 MHz.

How does the device handle input clock failure?

It automatically enters holdover mode using stored historical frequency data if no valid input clocks are available.

Can the device switch between inputs without glitches?

Yes, it supports hitless switching for fractionally related inputs and glitchless switching for inputs within ±500 ppm.