SI5338A-B01449-GM

Overview

The SI5338A-B01449-GM is a programmable quad clock generator utilizing MultiSynth technology to synthesize any frequency on four independent output drivers. It supports differential and single-ended formats including LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL. The device operates from a 1.8 V, 2.5 V, or 3.3 V core supply with a typical current of 45 mA. It features low phase jitter of 0.7 ps RMS typ, flexible input references up to 710 MHz, and I2C/SMBus programming. Packaged in a 4x4 mm QFN-24, it supports glitchless frequency adjustments and spread spectrum generation.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four differential output drivers with 0 ppm precision.
• Low phase jitter of 0.7 ps RMS typ; compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS standards.
• Highly-configurable output drivers supporting LVPECL/LVDS/CML (up to 710 MHz), HCSL (up to 250 MHz), CMOS (up to 200 MHz), and SSTL/HSTL (up to 350 MHz).
• Independent frequency increment/decrement feature allows glitchless frequency adjustments in 1 ppm steps.

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 ordering suffix B01449 against the manufacturer's official documentation to confirm factory-programmed frequency settings. Confirm package type and RoHS compliance status prior to procurement. Ensure I2C pull-up voltages match the system bus requirements for proper interface operation.

Selection Notes

Select this component when multiple independent clock frequencies are required from a single IC. Verify that the target output format (LVPECL, LVDS, etc.) and frequency range fall within the specified limits for each driver. Check input reference compatibility, as the device accepts external crystals, CMOS, SSTL/HSTL, or differential inputs.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'A' designation typically indicates the 710 MHz maximum output capability variant. The 'B' suffix denotes specific factory-programmed parameters. The 'GM' suffix indicates the 24-lead QFN package form factor.

Replacement Considerations

Direct replacements within the same family include other Si5338 variants such as SI5338A-B-GMR or SI5338Q-B-GMR. When substituting, verify that the replacement part supports the required output formats and frequencies. Ensure the pinout remains compatible, as all Si5338 variants share the same 24-QFN footprint.