SI5338C-B04870-GM

Overview

The SI5338C-B04870-GM is a programmable clock generator from Skyworks Solutions, utilizing MultiSynth technology to synthesize any frequency on four independent output drivers. It supports differential and single-ended outputs with frequencies up to 710 MHz. The device operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V and features low phase jitter of 0.7 ps RMS typical. It is housed in a compact 4 x 4 mm QFN-24 package and is programmed via an I²C/SMBus interface.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis on four output drivers with 0 ppm precision.
• Supports flexible input references including external crystals (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential inputs (5–710 MHz).
• Configurable output drivers support LVPECL/LVDS/CML (up to 710 MHz), HCSL (up to 250 MHz), and CMOS (up to 200 MHz) formats.
• Features glitchless frequency adjustments in 1 ppm steps and independent phase adjustment with <20 ps accuracy.

Applications

• PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS compliant systems.
• Ethernet switch/router and 1 GbE/10 GbE networking equipment.
• Processor and FPGA clocking solutions.
• Broadcast video/audio timing infrastructure.

Procurement Notes

Verify the specific ordering suffix B04870 against the manufacturer's current datasheet to confirm the exact pre-programmed frequency configuration. Ensure compatibility with the target system's I²C bus voltage levels, as the device supports pull-up voltages from 1.71 V to 3.63 V. Confirm that the required output signal formats and frequencies fall within the specified operational limits for the selected driver supplies.

Selection Notes

Select this component when replacing multiple discrete oscillators with a single programmable source. Ensure the design accommodates the 4 x 4 mm QFN-24 footprint and provides adequate thermal dissipation, given the junction-to-ambient thermal resistance of 37 °C/W. Verify that the application requires independent output voltage domains (1.5 V, 1.8 V, 2.5 V, or 3.3 V) per driver to leverage the device's flexibility.

Part Context

This part belongs to the Si5338 family of I²C-programmable quad clock generators. The 'C' variant typically denotes specific performance characteristics or output configurations within the series, while the alphanumeric suffix indicates the factory-programmed frequency plan. It serves as a direct replacement for fixed-frequency crystal oscillators in high-speed digital interfaces.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. When replacing discrete oscillators, verify that the new device's jitter specifications meet the receiver's requirements and that the I²C programming interface is compatible with the host controller.