SI5338F-B04385-GM

Overview

The SI5338F-B04385-GM is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology to synthesize any frequency with zero ppm precision on four independent output drivers. It operates within a core supply range of 1.71 V to 3.63 V and supports input frequencies up to 710 MHz. The device features low phase jitter of 0.7 ps RMS typical and allows independent configuration of output signal formats (LVPECL, LVDS, CMOS, etc.) and voltages (1.5 V to 3.3 V). Packaged in a compact 24-lead QFN (4x4 mm), it is controlled via an I2C/SMBus interface.

Feature Summary

• MultiSynth technology enables independent, glitchless frequency synthesis on four differential or single-ended outputs.
• Supports flexible input references including external crystals (8–30 MHz), CMOS (up to 200 MHz), and differential inputs (up to 710 MHz).
• Configurable output drivers support various signal formats such as LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL.
• Includes independent phase adjustment (<20 ps steps) and spread spectrum generation capabilities.

Applications

• PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS compliant systems.
• Ethernet switch/router timing solutions.
• Processor and FPGA clocking architectures.
• Broadcast video/audio timing distribution.
• Telecom line cards and MSAN/DSLAM/PON equipment.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest documentation to confirm pinout assignments and factory programming configurations. Ensure that the required I2C pull-up voltage levels are compatible with the selected core supply voltage during system design.

Selection Notes

Select this component when multiple independent clock frequencies with varying signal formats and voltage levels are required from a single source. Consider the thermal resistance characteristics for PCB layout planning and ensure the input reference signal meets the slew rate requirements for optimal jitter performance.

Part Context

This part belongs to the Si5338 family of high-performance clock generators. The 'F' designation typically indicates a specific factory-programmed configuration variant within the series, while the 'GM' suffix denotes the tape-and-reel packaging format suitable for automated surface-mount assembly processes.

Replacement Considerations

Direct replacements must match the 24-QFN package and I2C control interface. Verify that alternative devices support the same maximum input frequency and provide equivalent jitter specifications for the target application environment.