SI5338M-B04368-GMR

Overview

The SI5338M-B04368-GMR is a programmable clock generator from Skyworks Solutions, utilizing MultiSynth technology to synthesize any frequency on four output drivers. It supports differential and single-ended outputs with independent voltage configurations of 1.5, 1.8, 2.5, or 3.3 V. The device operates on a single core supply (1.8, 2.5, or 3.3 V) and accepts inputs ranging from external crystals (8–30 MHz) to differential signals up to 710 MHz. Key electrical parameters include a typical RMS jitter of 0.7 ps, a maximum input frequency of 710 MHz, and a maximum output frequency of 710 MHz for LVDS/LVPECL formats. It features I2C/SMBus programming, glitchless frequency adjustments, and spread spectrum capabilities.

Feature Summary

• MultiSynth™ technology enables independent, zero ppm precision synthesis on four output drivers.
• Supports flexible input references including external crystals (8-30 MHz), CMOS (up to 200 MHz), and differential inputs (up to 710 MHz).
• Configurable output drivers support various signal formats such as LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL.
• Features low phase jitter (0.7 ps RMS typ) and independent output voltage selection per driver.

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

Procurement Notes

Verify the specific ordering suffix B04368 against the manufacturer's current documentation to confirm pinout assignments and factory configuration settings. Ensure compatibility with the required I2C bus voltage levels (1.71 V to 3.63 V) and check for moisture sensitivity handling requirements during assembly.

Selection Notes

Select this component when designing systems requiring independent frequency synthesis across multiple domains with strict jitter constraints. Consider the available output formats (LVDS, LVPECL, etc.) and voltage levels to match the load requirements. Verify that the input reference source falls within the supported frequency ranges for optimal performance.

Part Context

This part belongs to the Si5338 family of high-performance, low-jitter clock generators. The family shares common architectural features like MultiSynth technology and I2C programmability but varies in pre-configured frequencies and output driver types based on the specific ordering suffix.

Replacement Considerations

Direct replacements within the Si5338 family require matching the output count, frequency range, and package type. Verify that alternative SKUs support the same output formats and voltage levels. Consult the manufacturer's cross-reference guide for confirmed substitutes with identical electrical characteristics.

FAQ

What is the maximum input frequency supported by the SI5338?

The device supports a maximum differential input frequency of 710 MHz. Single-ended CMOS inputs are supported up to 200 MHz.

Can the output voltages be configured independently?

Yes, each of the four output drivers can be independently configured to operate at 1.5, 1.8, 2.5, or 3.3 V.

Does the device support glitchless frequency changes?

Yes, the SI5338 includes an independent frequency increment/decrement feature that allows glitchless frequency adjustments in 1 ppm steps.