SI5338N-B04259-GM

Overview

The SI5338N-B04259-GM is a programmable quad clock generator from Skyworks Solutions. It synthesizes four independent output clocks with zero ppm frequency accuracy using MultiSynth technology. The device supports differential and single-ended outputs, including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL formats. Maximum input frequency reaches 710 MHz via differential inputs, while outputs support up to 710 MHz for differential and 200 MHz for CMOS. It operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V, with typical current consumption of 45 mA.

Feature Summary

• MultiSynth technology enables any-frequency synthesis with 0 ppm precision across four outputs
• Supports flexible output formats: LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL
• Low phase jitter performance (0.7 ps RMS typ) compliant with PCIe Gen 1/2/3/4 standards
• I2C/SMBus programmable interface with independent glitchless frequency and phase adjustments

Applications

• PCIe Gen 1/2/3/4 common clock and SRNS generation
• Ethernet switch/router timing (1 GbE and 10 GbE)
• Processor and FPGA clocking systems
• Telecom line cards and broadcast video/audio timing

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm pinout configuration and factory-programmed parameters. Ensure I2C pull-up voltages align with the supported range of 1.71 V to 3.63 V. Confirm thermal management requirements for the 24-QFN package in the target application environment.

Selection Notes

Select this component when multiple distinct clock frequencies are required from a single source. Verify that the desired output signal formats (LVDS, LVPECL, etc.) match the load requirements. Check if the input reference frequency falls within the supported ranges for crystal, CMOS, or differential inputs. Consider the power supply constraints for both the core voltage and individual output drivers.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'N' suffix typically denotes a specific factory-programmed configuration variant within the series. The device replaces multiple discrete oscillators, reducing board space and power consumption while providing superior jitter performance compared to standard crystal oscillators.

Replacement Considerations

Direct replacements must be verified through Skyworks Solutions or authorized distributors. Cross-referencing requires matching the exact factory-programmed frequency and format specifications. Generic Si5338 variants may require reprogramming but will share the same electrical characteristics and pinout.