SI5342B-B03497-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5342B-B03497-GM is a jitter attenuator and clock multiplier from the Si5342 family, featuring four inputs and two outputs in a 44-QFN package. It supports output frequencies ranging from 0.001 MHz to 350 MHz using integer and fractional synthesis modes. The device operates on core voltages of VDD at 1.8 V ±5% and VDDA at 3.3 V ±5%, 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

• Generates any combination of output frequencies from any input frequency using fourth-generation DSPLL and MultiSynth technologies.
• 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.
• Includes in-circuit programmable non-volatile memory to ensure known frequency configuration upon power-up.

Clock Generators, PLLs, Frequency Synthesizers Applications

• OTN muxponders and transponders
• 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 availability and factory preprogramming status. Ensure the selected part number matches the required output frequency range and package type for your design implementation.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when low jitter performance and flexible frequency synthesis are required for applications supporting up to two outputs. Consider the Si5342 family variants if different output counts or frequency ranges better suit the system requirements.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345/44/42 Rev D series of jitter attenuating clock multipliers. The Si5342 variant specifically provides four inputs and two outputs in a compact 44-QFN package, distinguishing it from the higher-output Si5345 and Si5344 models.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other Si5342 family members such as SI5342A-D-GM, SI5342C-D-GM, and SI5342D-D-GM, which share the same package and pinout but offer different frequency synthesis capabilities.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum output frequency for the Si5342B variant?

The Si5342B variant supports an output frequency range from 0.001 MHz to 350 MHz.

Does the device support glitchless input switching?

Yes, the device can switch between input clock frequencies that are up to ±500 ppm apart without abrupt phase changes at the output.

How is the device programmed?

The device is programmable via a serial interface (I2C or SPI) and features in-circuit programmable non-volatile OTP memory.