SI5338B-B04135-GMR

Overview

The SI5338B-B04135-GMR is an I2C-programmable quad clock generator utilizing MultiSynth technology for independent frequency synthesis on four output drivers. It supports differential and single-ended outputs with configurable formats including LVPECL, LVDS, 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. Key electrical parameters include a maximum input frequency of 710 MHz (differential) and output frequencies up to 710 MHz for LVDS/LVPECL. It features low phase jitter of 0.7 ps RMS typ, zero ppm frequency accuracy, and spread spectrum capabilities.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four differential output drivers with true zero ppm accuracy.
• Highly-configurable output drivers support LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL formats with independent voltage levels (1.5, 1.8, 2.5, or 3.3 V).
• Low phase jitter performance of 0.7 ps RMS typical, compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS standards.
• Programmable via I2C/SMBus interface with glitchless frequency adjustments in 1 ppm steps and independent phase adjustment.

Applications

• PCIe Gen 1/2/3/4 timing
• Ethernet switch/router clocking
• Processor and FPGA clock generation
• Broadcast video/audio timing
• Telecom line cards

Procurement Notes

Verify the specific factory programming configuration associated with the B04135 suffix against the system requirements. Confirm that the GMR suffix indicates tape-and-reel packaging suitable for automated assembly. Ensure the design supports the required I2C pull-up voltages and crystal specifications if using the internal oscillator circuit.

Selection Notes

Select this component when multiple independent clock frequencies are required from a single package. Verify that the target output formats (LVDS, LVPECL, etc.) and voltage levels match the load requirements. Check that the input reference source (crystal, CMOS, or differential) falls within the supported frequency ranges defined in the datasheet.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'B' variant typically denotes a specific factory-programmed configuration for fixed frequency applications, while the 'GMR' suffix indicates a reel-based packaging option. It replaces discrete oscillators and level shifters in complex timing architectures.

Replacement Considerations

Direct pin-to-pin replacements within the Si5338 family may exist but require verification of the programmed frequency and output configuration. Other Skyworks programmable clock generators like the Si534x series offer higher performance but different interfaces. Ensure any substitute matches the 24-QFN package and I2C compatibility.