SI5338B-B04872-GM

Overview

The SI5338B-B04872-GM is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology to synthesize any frequency on four independent output drivers. It supports input frequencies up to 710 MHz and generates outputs with 0 ppm precision. The device operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V, consuming typically 45 mA. Key electrical parameters include a maximum output frequency of 710 MHz, a typical RMS phase jitter of 0.7 ps, and an operating temperature range of –40 °C to +85 °C. It is housed in a 24-lead QFN package.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis on four differential output drivers with zero ppm accuracy.
• Low phase jitter performance of 0.7 ps RMS typical, compliant with PCIe Gen 1/2/3/4 Common Clock standards.
• Flexible input reference options including external crystals (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential inputs (5–710 MHz).
• Independent output voltage per driver (1.5, 1.8, 2.5, or 3.3 V) supporting formats such as LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL.

Applications

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

Procurement Notes

Verify the specific ordering suffix B04872 against the manufacturer's current documentation to confirm the exact frequency plan and configuration. Ensure compatibility with I2C/SMBus interface requirements and check for moisture sensitivity handling instructions during assembly.

Selection Notes

Select this component when designing systems requiring low-jitter, flexible clock generation for high-speed interfaces like PCIe or Ethernet. Consider the available input reference types and required output voltage levels to ensure the configurable drivers meet the load specifications without additional buffering.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'B' suffix typically denotes a specific factory configuration or frequency plan within the series. The '-GM' suffix indicates the 24-lead QFN package variant suitable for surface-mount applications.

Replacement Considerations

Direct replacements within the same family include other Si5338 variants with different configuration suffixes (e.g., SI5338A, SI5338C) if the frequency plan matches. Verify pinout compatibility and software configuration tools (ClockBuilder Pro) support for the substitute part number.