SI5338C-B05520-GMR

Overview

The SI5338C-B05520-GMR is a programmable quad clock generator from Skyworks Solutions. It synthesizes four independent output clocks with zero ppm frequency accuracy using MultiSynth technology. The device supports flexible input references, including external crystals (8–30 MHz), CMOS (up to 200 MHz), and differential inputs (up to 710 MHz). Outputs are configurable for LVPECL, LVDS, HCSL, CMOS, SSTL, or HSTL formats across 0.16 to 710 MHz. It operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V, draws 45 mA typical current, and features low phase jitter of 0.7 ps RMS. The component is housed in a compact 4x4 mm QFN-24 package.

Feature Summary

• MultiSynth technology enables independent synthesis of any frequency on four output drivers with 0 ppm precision.
• Flexible input support includes external crystals (8–30 MHz), CMOS (5–200 MHz), and differential inputs (5–710 MHz).
• Configurable output drivers support LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL formats with independent voltage levels.
• Low phase jitter performance of 0.7 ps RMS typ and glitchless frequency adjustment via I2C/SMBus interface.

Applications

• PCIe Gen 1/2/3/4 common clock and SRNS compliant timing
• Ethernet switch/router and 1 GbE/10 GbE systems
• Processor and FPGA clocking
• Broadcast video/audio timing

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm factory programming parameters. Confirm that the QFN-24 package dimensions and thermal characteristics align with the target PCB land pattern requirements.

Selection Notes

Select this model when four independent clock outputs with varying frequencies and signal formats are required. Ensure the application utilizes an I2C-compatible controller for configuration. Verify that the system power budget accommodates the 45 mA typical core supply current and that the operating temperature range meets the –40 to +85 °C specification.

Part Context

This component belongs to the Si5338 family of high-performance clock generators. It replaces multiple discrete crystal oscillators by providing synthesized clock signals. The device integrates a PLL and MultiSynth stages within a space-saving 24-QFN package, designed for applications requiring precise timing synchronization across multiple data paths.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.

FAQ

What is the maximum input frequency supported by the Si5338?

The device supports differential inputs up to 710 MHz, CMOS inputs up to 200 MHz, and SSTL/HSTL inputs up to 350 MHz.

Can the output voltages be configured independently?

Yes, each output driver can be independently configured for supply voltages of 1.5 V, 1.8 V, 2.5 V, or 3.3 V.

How is the device programmed?

The Si5338 is programmed via an I2C/SMBus-compatible serial interface, which allows for configuration of frequency, format, and spread spectrum settings.