SI5342B-B05438-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5342B-B05438-GMR 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 up to 350 MHz using integer and fractional synthesis modes. The device operates on a 1.8 V core voltage and 3.3 V analog supply within a -40°C to +85°C temperature range. It includes non-volatile memory for configuration storage and supports I2C/SPI interfaces.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency
• Ultra-low jitter performance with integrated loop filter
• Supports free-run, synchronous, and holdover modes of operation
• Features glitchless on-the-fly output frequency changes

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 factory preprogrammed configuration associated with the B05438 suffix against the design requirements. Confirm that the tape and reel packaging format meets the assembly line specifications. Ensure the ordering part number matches the exact Rev D datasheet version to avoid compatibility issues with ClockBuilder Pro software configurations.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when only two output clocks are required, reducing board space compared to the Si5345 or Si5344 variants. The B-series designation indicates support for frequencies up to 350 MHz; verify if higher frequency ranges are needed for the application. Ensure the serial interface and NVM programming capabilities align with the system's control architecture.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5342 series, which provides four inputs and two outputs in a compact 7x7 mm 44-QFN package. It shares the same underlying DSPLL and MultiSynth technology as the larger Si5345 and Si5344 families but offers reduced channel count for cost-sensitive or space-constrained designs.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Si5342A-D-GMR

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum output frequency for the Si5342B variant?

The Si5342B variant supports output frequencies ranging from 0.001 MHz to 350 MHz.

Does the device support automatic input clock switching?

Yes, the device features an automatic input selection state machine based on input clock qualification, priority, and revertive options.

How is the configuration stored in the device?

Configuration data is stored in in-circuit programmable non-volatile OTP memory, allowing the device to power up with a known frequency configuration.