SI5338M-B05842-GM

Overview

The SI5338M-B05842-GM is a programmable clock generator from Skyworks Solutions, utilizing MultiSynth technology to synthesize any frequency on four output drivers. It supports differential inputs up to 710 MHz and outputs in LVPECL, LVDS, CML, HCSL, CMOS, SSTL, or HSTL formats. The device operates on a single core supply of 1.8, 2.5, or 3.3 V with a typical current of 45 mA. It features low phase jitter of 0.7 ps RMS, independent output voltage control, and I2C/SMBus programming via ClockBuilder Pro software.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis on four differential output drivers with 0 ppm precision.
• Supports flexible input references including external crystals (8–30 MHz), CMOS (5–200 MHz), and differential inputs (up to 710 MHz).
• Configurable output drivers support various signal formats: LVPECL/LVDS/CML (up to 710 MHz), HCSL (up to 250 MHz), and CMOS (up to 200 MHz).
• Features glitchless frequency adjustments in 1 ppm steps and independent phase adjustment with <20 ps accuracy.

Applications

• PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS compliant systems.
• Ethernet switch/router and 1 GbE/10 GbE networking equipment.
• Processor and FPGA clocking solutions.
• Broadcast video/audio timing infrastructure.

Procurement Notes

Verify the specific ordering suffix B05842 against the manufacturer's official documentation to confirm the exact frequency plan and configuration. Ensure compatibility with the required I2C pull-up voltages, noting that registers must be adjusted if the bus voltage is below 2.5 V. Confirm package availability and moisture sensitivity level handling procedures prior to assembly.

Selection Notes

Select this component for applications requiring low-jitter, any-frequency synthesis across multiple outputs. Ensure the input reference matches the supported ranges (crystal, CMOS, or differential). Verify that the required output voltage levels (1.5, 1.8, 2.5, or 3.3 V) are compatible with the target loads. Use ClockBuilder Pro software for accurate configuration and register generation.

Part Context

This part belongs to the Si5338 family of I2C-programmable quad clock generators. It is designed to replace multiple discrete oscillators, reducing board space and power consumption. The device integrates a PLL and MultiSynth synthesizers within a compact 4x4 mm QFN-24 package, offering high flexibility for complex timing architectures.

Replacement Considerations

Direct pin-to-pin replacements within the same family include other Si5338 variants with different factory configurations (e.g., SI5338A, SI5338Q). Verify that the substitute part supports the required output frequencies and formats. Cross-model substitution requires re-configuration via ClockBuilder Pro to match the original design specifications.

FAQ

What is the maximum input frequency for differential clocks?

The maximum input frequency for differential clocks on pins IN1/2 and IN5/6 is 710 MHz.

Can the output voltage be configured independently for each driver?

Yes, each output driver can be independently configured to support supply voltages of 1.5, 1.8, 2.5, or 3.3 V.

Is the device compliant with PCIe standards?

Yes, the Si5338 is compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 Separate Reference No Spread (SRNS) requirements.