SI5338C-B12241-GM

Overview

The SI5338C-B12241-GM is an I2C-programmable quad clock generator from Skyworks Solutions. It utilizes MultiSynth technology to synthesize any frequency on four independent output drivers with zero ppm precision. The device supports flexible input references including external crystals (8–30 MHz), CMOS, SSTL/HSTL, and differential inputs up to 710 MHz. Outputs are configurable for LVPECL, LVDS, HCSL, CMOS, SSTL, or HSTL formats with independent supply voltages of 1.5, 1.8, 2.5, or 3.3 V. Key electrical parameters include a core supply voltage range of 1.71–3.63 V, typical operating current of 45 mA, and low phase jitter of 0.7 ps RMS.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four differential output drivers with true zero ppm accuracy.
• Flexible input support for external crystals (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential inputs (5–710 MHz).
• Configurable output drivers supporting LVPECL/LVDS (up to 710 MHz), HCSL (up to 250 MHz), CMOS (up to 200 MHz), and SSTL/HSTL (up to 350 MHz).
• Glitchless frequency adjustments via independent increment/decrement features in 1 ppm steps.

Applications

• PCIe Gen 1/2/3/4 common clock and Gen 3 SRNS compliant timing.
• Ethernet switch/router and 1 GbE/10 GbE interfaces.
• Processor and FPGA clocking systems.
• Broadcast video/audio timing distribution.
• Telecom line cards and MSAN/DSLAM/PON equipment.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm configuration details. Ensure compatibility with I2C/SMBus interface requirements and check for moisture sensitivity handling during storage and assembly. Confirm that the selected package variant matches the PCB land pattern specifications provided in the datasheet.

Selection Notes

Select this component when designing systems requiring multiple independent clock frequencies from a single IC. Ensure the required output signal formats (LVPECL, LVDS, etc.) and voltage levels are supported by the available drivers. Verify that the input reference source falls within the specified frequency ranges for the chosen input type. Consider thermal characteristics if operating at maximum load conditions.

Part Context

The SI5338 series belongs to Skyworks' MultiSynth family of programmable clock generators. This specific part number represents a customized configuration within the Si5338 family, designed to replace multiple discrete crystal oscillators. It integrates phase-locked loops and synthesizers into a compact 4x4 mm QFN package, offering a space-efficient solution for complex timing architectures.

Replacement Considerations

Direct replacements must be sought from the Si5338 family variants with matching pinouts and electrical specifications. Verify that alternative part numbers support the same output formats and frequency ranges. Consult the manufacturer's cross-reference guide for confirmed substitutes that maintain functional equivalence without requiring schematic changes.