SI5342B-B05632-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5342B-B05632-GMR is a jitter attenuator and clock multiplier from the Si5342 family, manufactured by Skyworks Solutions Inc. It features four inputs and two outputs housed in a 44-QFN 7x7 mm package. The device supports differential input frequencies from 8 kHz to 750 MHz and LVCMOS inputs up to 250 MHz. Output frequencies range from 100 Hz to 350 MHz for this specific variant. It achieves an ultra-low jitter performance of 90 fs rms and operates within a temperature range of -40°C to +85°C. The core voltage (VDD) is 1.8 V ±5%, while the analog supply (VDDA) is 3.3 V ±5%. Outputs support LVDS, LVPECL, LVCMOS, CML, and HCSL formats.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using fourth-generation DSPLL and MultiSynth technologies.
• Provides programmable jitter attenuation bandwidth ranging from 0.1 Hz to 4 kHz for optimized performance.
• Supports hitless input clock switching with automatic or manual selection capabilities.
• Includes in-circuit programmable non-volatile memory for known power-up configuration.

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 ordering suffix 'GMR' indicates tape and reel packaging as per datasheet conventions. Confirm the factory preprogrammed configuration matches the required frequency plan, as custom part numbers are assigned by Skyworks. Ensure compatibility with the 44-QFN 7x7 mm footprint during PCB layout review.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when only two output clocks are required, distinguishing it from the 4-output Si5344 and 10-output Si5345 variants. Verify that the maximum output frequency requirement does not exceed 350 MHz, as higher frequency ranges require the 'A' or 'C' series designations. Ensure the application supports the 4-input architecture.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5345/44/42 Rev D family of jitter attenuators. The Si5342 specifically offers a compact 44-QFN 7x7 mm package with 4 inputs and 2 outputs. It shares the same core DSPLL technology and software tools (ClockBuilder Pro) as the larger Si5345 and Si5344 devices.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers: SI5342B-D-GM, SI5342B-D-GMR.