SI5338A-B09344-GM

Overview

The SI5338A-B09344-GM is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology to synthesize any frequency on four independent output drivers with 0 ppm precision. It supports input frequencies up to 710 MHz and generates outputs ranging from 0.16 MHz to 710 MHz depending on the selected format (LVPECL, LVDS, CML, HCSL, CMOS, SSTL, or HSTL). The device operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V, drawing a typical current of 45 mA. It features low phase jitter of 0.7 ps RMS typ, glitchless frequency adjustments, and independent phase control. Packaged in a compact 4x4 mm QFN-24, it is configured via an I2C/SMBus interface.

Feature Summary

• MultiSynth™ Technology: Enables independent, any-frequency synthesis on four differential output drivers with true zero ppm accuracy.
• Low Jitter Performance: Achieves typical phase jitter of 0.7 ps RMS, compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS standards.
• Flexible Input/Output: Supports differential inputs up to 710 MHz and configurable outputs including LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL.
• Glitchless Adjustment: Features independent frequency increment/decrement in 1 ppm steps and phase adjustment with <20 ps resolution.

Applications

• PCIe Gen 1/2/3/4 systems
• Ethernet switch/router clocking
• Processor and FPGA clock generation
• Broadcast video/audio timing
• Telecom line cards and MSAN/DSLAM/PON

Procurement Notes

Verify the specific ordering suffix B09344 against the manufacturer's official documentation to confirm factory-programmed frequency and configuration settings. Ensure compatibility with the required I2C pull-up voltage levels, noting that register writes may be necessary if the bus voltage is below 2.5 V. Confirm moisture sensitivity handling requirements during storage and assembly.

Selection Notes

Select this component when multiple independent clock frequencies are required from a single package. Ensure the target output formats (e.g., LVDS vs. CMOS) align with the receiver's voltage requirements, as each driver supports independent supply voltages (1.5 V to 3.3 V). Verify that the input reference source matches the supported frequency ranges for the chosen input type (crystal, CMOS, or differential).

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. It replaces discrete crystal oscillators and buffers, consolidating up to four clock sources into one space-saving component. The 'A' designation typically indicates the high-performance variant supporting frequencies up to 710 MHz, distinguishing it from lower-frequency variants within the same series.

Replacement Considerations

Direct pin-to-pin replacements within the Si5338 family must be verified for matching maximum output frequencies and output driver configurations. Substitutes like the SI5338B or SI5338P offer different frequency limits or jitter profiles; ensure the replacement meets the specific jitter and frequency requirements of the design.