SI5338C-B12241-GMR

Overview

The SI5338C-B12241-GMR is a programmable quad clock generator utilizing MultiSynth™ technology to synthesize any frequency with zero ppm precision on four independent output drivers. It operates from a single core supply of 1.8, 2.5, or 3.3 V and supports input frequencies up to 710 MHz. The device features low phase jitter (0.7 ps RMS typ) and allows independent configuration of output formats including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL. Each driver supports independent voltage levels of 1.5, 1.8, 2.5, or 3.3 V. Programming is performed via an I²C/SMBus interface, and the component is housed in a compact 4 x 4 mm QFN-24 package.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis on four differential output drivers with 0 ppm accuracy.
• Supports flexible input references including external crystals (8–30 MHz), CMOS (5–200 MHz), and differential inputs (up to 710 MHz).
• Configurable outputs support various signal formats: LVPECL/LVDS (up to 710 MHz), HCSL (up to 250 MHz), CMOS (up to 200 MHz), and SSTL/HSTL (up to 350 MHz).
• 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 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 B12241 against the manufacturer's official documentation to confirm the programmed frequency plan and output configuration. Ensure the I²C pull-up voltage requirements are met if operating below 2.5 V. Confirm that the application design accounts for the recommended PCB land pattern for the 24-QFN package to maintain thermal and electrical performance standards.

Selection Notes

Select this component when multiple independent clock frequencies are required from a single source with high precision. It is suitable for replacing multiple discrete crystal oscillators. Consider the output format requirements; ensure the target loads match the supported LVPECL, LVDS, HCSL, CMOS, SSTL, or HSTL specifications. Verify that the input reference frequency falls within the supported ranges for the chosen input pin configuration.

Part Context

This part belongs to the Si5338 family of I²C-programmable clock generators from Skyworks Solutions. The family utilizes patented MultiSynth™ architecture to provide low-jitter frequency synthesis in a space-saving package. The Si5338 series is designed to replace multiple fixed-frequency oscillators, reducing board space and power consumption while offering flexibility through software programming.

Replacement Considerations

Direct replacements within the same family include other Si5338 variants with different factory-programmed configurations. When substituting, verify that the new part number matches the required output frequencies, formats, and input specifications. Cross-model compatibility with Si535x series devices may exist but requires validation of pinout and register compatibility.