SI5361B-A15690-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5361B-A15690-GM is an 18-output jitter attenuator and clock multiplier from Skyworks Solutions. It integrates one fifth-generation DSPLL™ and two MultiSynth™ blocks, supporting output frequencies up to 1.3 GHz. The device accepts differential inputs from 8 kHz to 1000 MHz or LVCMOS inputs up to 250 MHz. It features ultra-low phase jitter performance of less than 55 fs RMS typ and enhanced hitless switching with a typical phase transient of 35 ps. Operating temperatures range from -40 °C to +95 °C in a 72-lead QFN package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates one DSPLL and two MultiSynths for flexible frequency generation
• Supports enhanced hitless switching to minimize phase transients during input clock changes
• Provides independent crystal or XO reference inputs without termination resistors
• Includes in-circuit programmable non-volatile memory for known power-up configurations

Clock Generators, PLLs, Frequency Synthesizers Applications

• 56G/112G/224G PAM4 SerDes clocking
• OTN muxponders and transponders
• 100/200/400/600/800G networking line cards
• Datacenter switches

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm interface requirements and factory programming status. Ensure the ambient temperature rating aligns with system thermal constraints. Confirm that the 72-QFN package dimensions match the PCB footprint design. Validate supply voltage levels for VDD18 and VDDA before integration.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when a single PLL architecture with two independent MultiSynths is required. Compare against the Si5361A variant if additional PLL resources are needed. Consider the Si5361H variant if output frequencies exceeding 1.3 GHz are necessary. Verify compatibility with ClockBuilder Pro software for configuration.