SI5338M-B04751-GMR

Overview

The SI5338M-B04751-GMR is an I2C-programmable quad clock generator from Skyworks Solutions. It synthesizes any frequency on four output drivers using MultiSynth technology, achieving zero ppm precision. The device supports a core supply of 1.8 V, 2.5 V, or 3.3 V and operates within a temperature range of –40 to +85 °C. Key electrical parameters include a maximum input frequency of 710 MHz, a typical phase jitter of 0.7 ps RMS, and a typical core supply current of 45 mA. It is housed in a compact 4 x 4 mm 24-lead QFN package.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis with 0 ppm accuracy on four differential output drivers.
• Supports flexible input references including external crystals (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential inputs (5–710 MHz).
• Features low phase jitter of 0.7 ps RMS typ and independent output voltage configuration (1.5, 1.8, 2.5, or 3.3 V) per driver.
• Includes glitchless frequency adjustments via independent increment/decrement features and programmable spread spectrum on any output.

Applications

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

Procurement Notes

Verify the specific factory programming code B04751 against the target design requirements using Skyworks ClockBuilder Pro software. Confirm that the GMR suffix indicates tape-and-reel packaging suitable for automated surface-mount assembly processes.

Selection Notes

Select this component when designing systems requiring four independent clock outputs with varying frequencies and signal formats. Ensure the application utilizes a compatible I2C interface for configuration and verify that the required output swing levels match the available VDDOx supply options.

Part Context

This part belongs to the Si5338 family of high-performance, low-jitter clock generators. The 'M' designation typically denotes a specific factory-programmed variant within the series, distinguished by its pre-configured frequency plan compared to blank or user-programmable versions.

Replacement Considerations

Direct pin-to-pin replacements within the same package require identical factory programming codes. Verify functional equivalence for PCIe compliance and jitter specifications if substituting with other Si5338 variants or competitor devices.