SI5342C-A-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5342C-A-GM is a jitter attenuator and clock multiplier featuring four inputs and two outputs. 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 utilizes integer-only synthesis modes and achieves an ultra-low jitter of 90 fs rms. It operates on core voltages of 1.8 V and 3.3 V 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 technology
• Supports hitless input clock switching with automatic or manual selection capabilities
• Includes in-circuit programmable non-volatile memory for known power-up configurations
• Features fully integrated loop filter to eliminate discrete noise coupling risks

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 ensure correct package and temperature grade alignment. Confirm that the integer-only synthesis mode meets the design requirements, as this variant differs from fractional counterparts. Cross-reference the datasheet revision to validate electrical specifications before finalizing procurement orders.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when only two output clocks are required, distinguishing it from the Si5344 (four outputs) and Si5345 (ten outputs). Ensure the application requires integer-only frequency synthesis, as this model does not support fractional division. Verify that the 44-QFN 7x7 mm package dimensions fit the PCB layout constraints and thermal management strategy.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5342 family, which shares the same Rev D silicon architecture as the Si5344 and Si5345 devices. The primary distinction lies in the number of available output channels, with the Si5342 providing two outputs compared to four or ten in its siblings. All models utilize the MultiSynth and DSPLL technologies described in the shared datasheet.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct functional substitutes include the Si5342A-D-GM, Si5342B-D-GM, and Si5342D-D-GM. These variants differ primarily in supported frequency ranges and synthesis modes (fractional vs. integer). Ensure the replacement matches the specific integer-only requirement if applicable.