SI5342A-B05474-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5342A-B05474-GMR is a jitter attenuator and clock multiplier from the Si5345/44/42 family, featuring four inputs and two outputs in a 44-QFN package. It supports differential input frequencies from 8 kHz to 750 MHz and LVCMOS inputs up to 250 MHz. Output frequencies range from 100 Hz to 1028 MHz for differential signals and up to 250 MHz for LVCMOS. The device operates on a 1.8 V core voltage (VDD) and a 3.3 V analog supply (VDDA), with independent output supplies configurable for 3.3 V, 2.5 V, or 1.8 V. It functions within a temperature range of –40 °C to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Combines fourth-generation DSPLL and MultiSynth technologies for any-frequency clock generation and jitter attenuation.
• Includes in-circuit programmable non-volatile memory (NVM) to ensure known frequency configuration upon power-up.
• Supports free-run, synchronous, and holdover modes with automatic and manual input clock switching capabilities.
• Features fully integrated loop filters and digitally programmable jitter attenuation bandwidth for optimized performance.

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 tape-and-reel packaging and factory preprogramming status. Ensure compatibility with ClockBuilder Pro software for configuration. Check for RoHS compliance and lead-free specifications as required by your assembly process.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model for applications requiring two high-performance output clocks derived from multiple input sources. The 'A' variant supports both integer and fractional synthesis modes across the full frequency range. Verify that the 44-QFN package dimensions fit the PCB layout constraints and that the thermal requirements are met for the operating environment.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345/44/42 Rev D series, which utilizes Skyworks' proprietary DSPLL and MultiSynth technologies. The Si5342 variant specifically provides four inputs and two outputs, distinguishing it from the four-output Si5344 and ten-output Si5345 models within the same family.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Compatible substitutes include other variants within the Si5345/44/42 family, such as the SI5344A or SI5345A, provided the pin count and output requirements align. Ensure the replacement part supports the necessary synthesis modes and frequency ranges specified in the design.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum output frequency for differential signals?

The maximum output frequency for differential signals is 1028 MHz.

Does the device support glitchless input switching?

Yes, the device supports glitchless input switching between input clock frequencies that are up to ±500 ppm apart.

How is the loop filter implemented?

The loop filter is fully integrated on-chip, eliminating the risk of noise coupling associated with discrete solutions.