SI5338C-B05520-GM

Overview

The SI5338C-B05520-GM is a programmable quad clock generator utilizing MultiSynth technology to synthesize any frequency with 0 ppm precision on four independent output drivers. It supports differential and single-ended 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. It features low phase jitter of 0.7 ps RMS typ, flexible input references up to 710 MHz, and configurable spread spectrum modulation. Encased in a 4x4 mm QFN-24 package, it functions within an ambient temperature range of -40°C to +85°C.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis on four output drivers with zero ppm accuracy.
• Supports diverse output formats: LVPECL/LVDS (up to 710 MHz), HCSL (up to 250 MHz), CMOS (up to 200 MHz), and SSTL/HSTL (up to 350 MHz).
• Low phase jitter performance of 0.7 ps RMS typical, compliant with PCIe Gen 1/2/3/4 Common Clock standards.
• I2C/SMBus compatible programming interface with support for independent frequency increment/decrement and phase adjustment.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm pinout configuration and factory pre-programming settings. Ensure the I2C pull-up voltage requirements are met if operating below 2.5 V. Confirm thermal management capabilities for the QFN-24 package under maximum load conditions.

Selection Notes

Select this component when multiple independent clock frequencies with varying signal formats are required from a single source. Evaluate the input reference type (crystal, CMOS, or differential) to ensure compatibility with the system design. Consider the output buffer supply voltage options (1.5 V, 1.8 V, 2.5 V, or 3.3 V) to match downstream receiver requirements.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. It replaces discrete crystal oscillators and frequency translators. The 'C' designation typically indicates a specific commercial grade or configuration variant within the Skyworks portfolio, while the alphanumeric suffix defines the factory-programmed register values.

Replacement Considerations

Direct replacements within the same family include other Si5338 variants with different factory presets. Verify that alternative part numbers maintain the same QFN-24 footprint and electrical specifications, particularly regarding output drive strength and jitter performance.

FAQ

["What is the maximum input frequency supported by the Si5338C-B05520-GM?","The device supports a maximum differential input frequency of 710 MHz. Single-ended CMOS inputs are limited to 200 MHz, while SSTL/HSTL inputs support up to 350 MHz."]

["Can the output voltages be configured independently?","Yes, each of the four output drivers can be independently configured to operate at 1.5 V, 1.8 V, 2.5 V, or 3.3 V supply levels."]

["Is the device compliant with PCIe standards?","Yes, the Si5338 is compliant with PCIe Gen 1, 2, 3, and 4 Common Clock standards, as well as Gen 3 SRNS."]