SI5338N-B04374-GM

Overview

The SI5338N-B04374-GM is a programmable quad clock generator from Skyworks Solutions. It utilizes MultiSynth technology to synthesize any frequency on four independent output drivers with zero ppm precision. The device supports differential and single-ended outputs, including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL formats. It operates from a single core supply of 1.8 V, 2.5 V, or 3.3 V and features low phase jitter of 0.7 ps RMS typical. Configuration is performed via an I2C/SMBus interface.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four output drivers with 0 ppm accuracy.
• Supports flexible input references: 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 selectable at 1.5, 1.8, 2.5, or 3.3 V.
• Features glitchless frequency adjustments in 1 ppm steps and independent phase adjustment with <20 ps resolution.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm pinout and configuration settings. Ensure the I2C pull-up voltage compatibility matches the system bus requirements, particularly if operating below 2.5 V. Confirm thermal management strategies for the QFN-24 package under maximum load conditions.

Selection Notes

Select this component when multiple independent clock frequencies are required from a single source. Verify that the desired output signal formats (LVPECL, LVDS, etc.) align with the target receiver specifications. Check that the input reference frequency falls within the supported ranges for the chosen input mode.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. It replaces discrete crystal oscillators and frequency translators. The device integrates a PLL and MultiSynth stages to provide low-jitter synthesis in a compact 4x4 mm QFN package.

Replacement Considerations

Direct replacements within the Si5338 family include SI5338Q-B-GMR and SI5338F-B-GMR. Verify that the substitute part number supports the required output configurations and input frequencies specified in the design.