SI5338F-B04385-GMR

Overview

The SI5338F-B04385-GMR is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology to synthesize any frequency on four independent output drivers. It supports core supply voltages of 1.8 V, 2.5 V, or 3.3 V and operates within an ambient temperature range of –40 °C to +85 °C. The device features a maximum input frequency of 710 MHz and output frequencies up to 710 MHz for differential formats (LVPECL/LVDS/CML) or 200 MHz for CMOS. Typical phase jitter is 0.7 ps RMS, with a typical core supply current of 45 mA. It is housed in a 24-lead QFN package measuring 4 x 4 mm.

Feature Summary

• I2C/SMBus programmable interface with ClockBuilder Pro software support
• Independent output voltage configuration per driver: 1.5, 1.8, 2.5, or 3.3 V
• Glitchless frequency adjustment via independent increment/decrement feature
• Supports PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS compliance

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 factory programming code B04385 against the official datasheet ordering information table to confirm the exact synthesized frequencies and output configurations. Ensure I2C pull-up voltages are compatible with the selected core supply voltage, noting that register writes may be required if the bus voltage is below 2.5 V.

Selection Notes

Select this component when replacing multiple crystal oscillators with a single low-jitter synthesizer. Confirm that the required output signal formats (LVPECL, LVDS, HCSL, CMOS, etc.) match the available driver capabilities. Verify that the input reference source (crystal, CMOS, or differential) falls within the supported frequency ranges specified in the electrical characteristics.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'F' suffix typically denotes a specific output configuration variant within the series, while 'GMR' indicates tape-and-reel packaging. The device integrates a PLL and MultiSynth stages to provide zero ppm frequency accuracy across all outputs.

Replacement Considerations

Direct pin-to-pin replacements within the Si5338 family require matching the output configuration suffix. Consult the manufacturer's selection guide to identify variants with identical frequency synthesis profiles or compatible output drive strengths.