SI5338B-B09440-GM

Overview

The SI5338B-B09440-GM is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology for independent frequency synthesis on four output drivers. It supports any frequency up to 710 MHz with zero ppm precision and features low phase jitter of 0.7 ps RMS typical. The device accepts various input references including differential clocks up to 710 MHz and single-ended inputs up to 200 MHz. Outputs are configurable for LVPECL, LVDS, CML, HCSL, CMOS, SSTL, or HSTL formats with independent supply voltages of 1.5, 1.8, 2.5, or 3.3 V per driver. It operates on a single core supply of 1.8, 2.5, or 3.3 V within a -40 to +85 °C temperature range in a 24-lead QFN package.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four differential output drivers with 0 ppm precision.
• Low phase jitter performance of 0.7 ps RMS typical, compliant with PCIe Gen 1/2/3/4 Common Clock standards.
• Flexible input reference options: external crystal (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), or differential (5–710 MHz).
• Independent output voltage configuration per driver supporting 1.5, 1.8, 2.5, or 3.3 V levels.

Applications

• PCIe Gen 1/2/3/4 timing
• Ethernet switch/router clocking
• Processor and FPGA clocking
• Broadcast video/audio timing

Procurement Notes

Verify the specific B09440 ordering suffix against the manufacturer's latest datasheet revision 1.6 to confirm exact output frequencies and pin configurations. Confirm availability status as distribution listings may vary. Ensure I2C pull-up voltages match the system design requirements, noting that bus voltages below 2.5 V require specific register writes for compatibility.

Selection Notes

Select this component when designing systems requiring multiple independent clock frequencies from a single source with high precision. Ensure the required output signal format (LVPECL, LVDS, etc.) and voltage levels are supported by the specific output drivers. Verify that the input reference frequency falls within the supported ranges for the chosen input pins. Consider thermal resistance characteristics if operating at maximum load currents.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'B' suffix typically denotes a specific version or revision within the Si5338 series, while 'GM' indicates the lead-free QFN-24 package. The unique identifier B09440 specifies the factory-programmed clock configuration, distinguishing it from other variants like SI5338A or SI5338Q which may have different default frequencies or capabilities.

Replacement Considerations

Direct replacements must be sought from the Si5338 family with matching B-series specifications. Verify that alternative part numbers support the same output formats and frequency ranges. Check for pin-to-pin compatibility in the 24-QFN package. Ensure that the replacement device supports the same I2C interface and programming software compatibility.