SI5391A-A15660-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5391A-A15660-GMR is a factory pre-programmed ultra-low-jitter clock generator featuring 12 outputs and integer/fractional synthesis capabilities. It supports output frequencies up to 1028 MHz with jitter performance of 115 fs RMS in fractional mode. The device operates on a 1.8 V core supply (VDD) and a 3.3 V analog supply (VDDA), consuming approximately 120 mA. It utilizes a 64-QFN 9x9mm package and functions within a temperature range of -40°C to +85°C. The 'R' suffix indicates tape and reel packaging.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any combination of output frequencies from any input frequency using MultiSynth technology
• Provides highly configurable outputs compatible with LVDS, LVPECL, LVCMOS, CML, and HCSL formats
• Supports in-circuit programming via I2C or SPI serial interfaces with non-volatile memory storage

Clock Generators, PLLs, Frequency Synthesizers Applications

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

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific configuration encoded in the A15660 sequence against design requirements before procurement. Confirm that the tape and reel packaging aligns with automated assembly equipment specifications. Ensure ESD handling protocols are followed due to moisture sensitivity classification. Validate that the factory pre-programmed settings match the intended system clock topology.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this part when fixed, factory-defined clock parameters are preferred over field programmability. The Si5391A grade supports differential outputs up to 1028 MHz, distinguishing it from lower-frequency variants. Consider the GMR suffix for high-volume surface mount manufacturing processes requiring reel-based delivery rather than tray packaging.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5391 family of any-frequency, any-output clock generators. The 'A' designation indicates support for output frequencies up to 1028 MHz with integer and fractional synthesis modes. The 'GM' suffix denotes the 64-QFN package and industrial temperature range, while 'R' specifies tape and reel shipping.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

SI5391A-A15660-GM (Tray Packaging)

Clock Generators, PLLs, Frequency Synthesizers FAQ

What does the 'R' suffix indicate in the part number?

The 'R' suffix denotes that the device is supplied in tape and reel packaging, suitable for automated pick-and-place assembly.

Can the factory pre-programmed configuration be modified after purchase?

Yes, the device supports in-circuit programming via I2C or SPI. However, the non-volatile memory allows writing only two times, after which the new configuration becomes permanent.

What is the maximum output frequency supported by the Si5391A grade?

The Si5391A grade supports differential output frequencies ranging from 100 Hz up to 1028 MHz.