SI5338D-B-GM

Overview

The SI5338D-B-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 configurable signal formats including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL. The device operates from a single core supply of 1.8 V, 2.5 V, or 3.3 V and accepts flexible input references such as external crystals (8–30 MHz), CMOS (up to 200 MHz), or differential inputs (up to 710 MHz). Key electrical parameters include a typical phase jitter of 0.7 ps RMS, a maximum output frequency of 710 MHz for differential signals, and operation within a temperature range of –40 °C to +85 °C.

Feature Summary

• MultiSynth™ Technology: Enables independent, any-frequency synthesis with zero ppm precision on four output drivers.
• Flexible Input/Output: Supports diverse input sources (crystal, CMOS, differential) and configurable output formats (LVPECL, LVDS, HCSL, CMOS, etc.).
• Low Jitter Performance: Achieves typical phase jitter of 0.7 ps RMS, compliant with PCIe Gen 1/2/3/4 standards.
• Glitchless Frequency Adjustment: Features independent frequency increment/decrement in 1 ppm steps and phase adjustment with <20 ps accuracy.

Applications

• PCIe Gen 1/2/3/4 Common Clock and SRNS systems
• Ethernet switch/router clocking (1 GbE/10 GbE)
• Processor and FPGA clock generation
• Broadcast video/audio timing distribution

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type, tape/reel specifications, and environmental compliance status. Ensure the I2C pull-up voltage requirements match the system design, particularly if operating below 2.5 V. Confirm availability through authorized distributors as part numbers may be subject to change without notice.

Selection Notes

Select this component when multiple distinct clock frequencies are required from a single IC to reduce board space compared to discrete oscillators. Ensure the target output format (e.g., LVDS vs. CMOS) matches the load requirements. Verify that the input reference source (crystal vs. driven clock) aligns with the available system clock infrastructure. Consider the power supply constraints, as the device requires a single core voltage but allows independent output driver voltages.

Part Context

The SI5338D-B-GM belongs to the Si5338 family of low-jitter clock generators. This series is designed to replace multiple crystal oscillators in high-performance digital systems. The 'B' suffix typically denotes a specific revision or configuration variant within the Si5338 product line, while 'GMR' indicates a lead-free, RoHS-compliant reel packaging format suitable for surface-mount assembly.

Replacement Considerations

Direct pin-to-pin replacements within the same family include other Si5338 variants with different pre-programmed frequencies or output configurations. When substituting, verify that the new part supports the required output frequencies and signal formats. Note that programming files generated by ClockBuilder Pro are not interchangeable between different Si5338 part numbers due to unique internal configurations.