SI5342A-B05385-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5342A-B05385-GM is a jitter attenuator and clock multiplier from the Si5342 family, featuring four inputs and two outputs in a 44-QFN 7x7 mm 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 achieves ultra-low jitter of 90 fs rms and operates within a temperature range of –40 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 hitless input clock switching with automatic or manual selection capabilities.
• Includes in-circuit programmable non-volatile memory for known power-up configuration.
• Features digitally programmable jitter attenuation bandwidth for application-level optimization.

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

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and programming status. Confirm RoHS compliance and lead times directly with authorized distributors as availability may vary. Ensure the selected variant matches the required input/output frequency ranges and voltage specifications for the target design.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a low-pin-count solution with two outputs is required. The Si5342A variant supports both integer and fractional synthesis modes up to 1028 MHz. Verify that the external crystal frequency falls within the recommended 25 to 54 MHz range for optimal jitter performance. Consider the Si5344 or Si5345 if additional output channels are needed.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5345/44/42 Rev D family of jitter attenuators. The Si5342 specifically offers a compact 44-QFN footprint with four inputs and two outputs. It utilizes Skyworks' proprietary DSPLL and MultiSynth technologies to provide high-performance clock generation and synchronization for demanding telecommunications and datacom applications.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The SI5342B-D-GM is a similar alternative within the same family. Verify compatibility regarding output frequency limits, as the 'B' suffix typically denotes a lower maximum frequency range compared to the 'A' suffix.