SI5338K-B04912-GM

Overview

The SI5338K-B04912-GM is a programmable quad 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 features low phase jitter of 0.7 ps RMS typical, 0 ppm frequency accuracy, and I2C/SMBus programming. It operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V within an operating temperature range of –40 °C to +85 °C.

Feature Summary

• I2C-programmable synthesis for any frequency on four outputs
• Low phase jitter: 0.7 ps RMS typical
• Supports LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL formats
• Independent output voltage selection (1.5, 1.8, 2.5, or 3.3 V)

Applications

• PCIe Gen 1/2/3/4 Common Clock and SRNS
• Ethernet switch/router clocking
• FPGA and processor clocking
• Broadcast video/audio timing
• Telecom line cards and MSAN/DSLAM/PON

Procurement Notes

Verify the specific factory configuration encoded in the ordering suffix B04912 against the target design requirements. Confirm that the QFN-24 package dimensions match the PCB land pattern specifications provided in the datasheet. Ensure the I2C pull-up voltages are compatible with the selected core supply voltage.

Selection Notes

Select this component when zero ppm frequency accuracy and glitchless frequency adjustments are required. Verify that the input reference source matches the supported formats, including external crystals (8–30 MHz), CMOS (5–200 MHz), or differential inputs (up to 710 MHz). Check if the required output drive strength and voltage levels align with the configurable driver options.

Part Context

This part belongs to the Si5338 family of high-performance clock generators. It replaces multiple discrete crystal oscillators by providing flexible frequency synthesis. The 'K' designation typically indicates a specific factory-programmed configuration variant within the broader Si5338 product line.

Replacement Considerations

Direct pin-to-pin replacements within the same family include other Si5338 variants such as SI5338Q-Bxxxxx-GM or SI5338A-Bxxxxx-GM. Ensure the replacement part has the identical NVM configuration or can be reprogrammed using ClockBuilder Pro software to match the original design parameters.