SI5391B-A15652-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5391B-A15652-GM is a factory pre-programmed, ultra low-jitter clock generator from the Si5391 family. It features 4 inputs and 12 outputs housed in a 64-QFN package. The device synthesizes any output frequency up to 350 MHz from any input frequency using MultiSynth technology. Key electrical parameters include an operating temperature range of -40°C to +85°C, a core voltage (VDD) of 1.8 V ±5%, and an analog supply (VDDA) of 3.3 V ±5%. Independent output supplies support 3.3 V, 2.5 V, or 1.8 V levels.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency
• Ultra-low phase jitter performance with integer and fractional modes
• Highly configurable outputs compatible with LVDS, LVPECL, LVCMOS, CML, and HCSL
• In-circuit programmable with non-volatile OTP memory

Clock Generators, PLLs, Frequency Synthesizers Applications

• 100/200/400G switches
• 56G/112G PAM4 SerDes reference clocks
• Clock tree generation replacing XOs, buffers, signal format translators
• Clocking for FPGAs, processors, memory
• Ethernet switches/routers

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific configuration encoded in the custom ordering suffix against the target system requirements before procurement. Confirm that the factory pre-programmed settings match the required input and output frequencies. Ensure the selected package and temperature range align with the design specifications.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this part when a fixed, pre-configured clock solution is preferred over field-programmable devices. Verify that the maximum output frequency requirement does not exceed 350 MHz. Ensure the application supports the required serial interface programming if dynamic reconfiguration is needed after initial power-up.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5391 family of ultra low-jitter clock generators. The 'B' grade indicates a maximum output frequency limit of 350 MHz, distinguishing it from the 'A' grade which supports frequencies up to 1028 MHz. The custom suffix identifies a unique factory pre-programmed configuration generated via ClockBuilder Pro software.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements must be verified against the specific pre-programmed configuration stored in the NVM. Generic Si5391B parts may require reprogramming to function identically. Consult the manufacturer's documentation for cross-reference availability and pin-to-pin compatibility.