SI5338M-B04372-GMR

Overview

The SI5338M-B04372-GMR 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 for LVDS/LVPECL/CML formats, 350 MHz for SSTL/HSTL, and 200 MHz for CMOS. The device features low phase jitter of 0.7 ps RMS typical, zero ppm frequency accuracy, and an I2C/SMBus interface for configuration. It operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V within a 4x4 mm QFN-24 package.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis on four output drivers with 0 ppm precision.
• Flexible input reference options including external crystals (8–30 MHz), CMOS (5–200 MHz), and differential inputs (up to 710 MHz).
• Independent output voltage support per driver at 1.5 V, 1.8 V, 2.5 V, or 3.3 V with configurable signal formats.
• 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 systems.
• Ethernet switch/router timing solutions.
• Processor and FPGA clocking architectures.
• Broadcast video/audio timing distribution.

Procurement Notes

Verify the specific ordering suffix B04372 against the manufacturer's current datasheet to confirm factory programming parameters. Ensure compatibility with I2C bus voltage levels if operating below 2.5 V by checking register settings. Confirm moisture sensitivity handling requirements during storage and assembly processes.

Selection Notes

Select this component when designing systems requiring multiple independent clock frequencies from a single IC. Ensure the required output format (LVDS, LVPECL, HCSL, etc.) matches the target load impedance and voltage levels. Verify that the input reference source falls within the supported frequency ranges for optimal jitter performance.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. It replaces discrete crystal oscillators and frequency translators, consolidating timing functions into a space-saving 24-QFN package. The device integrates PLLs and MultiSynth dividers to provide high-precision clock synthesis for high-speed digital interfaces.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate alternative Skyworks Si533x series variants based on specific frequency and output format requirements before substitution.