SI5338M-B-GMR

Overview

The SI5338M-B-GMR is a programmable quad clock generator utilizing MultiSynth technology. It synthesizes any frequency on four independent output drivers with zero ppm accuracy. The device supports differential and single-ended formats including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL. Input references range from external crystals (8–30 MHz) to differential clocks up to 710 MHz. Key electrical parameters include a core supply voltage of 1.8 V, 2.5 V, or 3.3 V, typical core current of 45 mA, and typical phase jitter of 0.7 ps RMS. It operates within a temperature range of –40 °C to +85 °C in a 24-lead QFN package.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four output drivers with true zero ppm precision.
• Low phase jitter of 0.7 ps RMS typ, compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS standards.
• Highly configurable outputs support LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL formats with independent voltage levels (1.5, 1.8, 2.5, or 3.3 V).
• Glitchless frequency adjustments via independent increment/decrement features in 1 ppm steps.

Applications

• PCIe Gen1/2/3/4 systems
• Ethernet switch/router timing
• Processor and FPGA clocking
• Broadcast video/audio timing
• Telecom line cards

Procurement Notes

Verify the specific ordering suffix 'M' against the manufacturer's official documentation to confirm pinout configuration, output enable control logic, and factory programming details. Ensure compatibility with I2C/SMBus interface requirements and check for moisture sensitivity classification prior to surface mount assembly.

Selection Notes

Select this component when independent frequency synthesis across four outputs is required with low jitter performance. Verify that the input reference source matches supported formats (crystal, CMOS, SSTL/HSTL, or differential). Confirm that the target output signal formats and frequencies fall within the specified ranges for the chosen driver voltages.

Part Context

The SI5338M-B-GMR belongs to the Si5338 family of I2C-programmable clock generators. This series replaces multiple crystal oscillators by providing flexible frequency translation and buffering capabilities. The device integrates NVM for storing configurations and supports spread spectrum modulation for EMI reduction.

Replacement Considerations

Consult the Skyworks Solutions cross-reference guide for verified substitutes. Ensure replacement parts maintain identical pin assignments, supply voltage ranges, and jitter specifications to guarantee functional compatibility without board redesign.