SI5338C-B05037-GMR

Overview

The SI5338C-B05037-GMR is an I2C-programmable quad clock generator from Skyworks Solutions. It synthesizes any frequency on four output drivers using MultiSynth technology, achieving zero ppm precision. The device supports differential and single-ended outputs with independent voltage configurations (1.5V to 3.3V). It operates from a single core supply of 1.8V, 2.5V, or 3.3V. Key electrical parameters include a maximum input frequency of 710 MHz and a typical phase jitter of 0.7 ps RMS. The unit is housed in a compact 4x4 mm QFN-24 package.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis with 0 ppm accuracy on four outputs.
• Supports flexible input references including external crystals (8–30 MHz), CMOS (up to 200 MHz), and differential inputs (up to 710 MHz).
• Features low phase jitter of 0.7 ps RMS typ and glitchless frequency adjustments via independent increment/decrement features.
• Configurable spread spectrum (SSC) allows modulation rates from 33 to 63 kHz with spreads between 0.5% and 5.0%.

Applications

• PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS compliant timing.
• Ethernet switch/router and 1 GbE/10 GbE interfaces.
• Processor and FPGA clocking systems.
• Broadcast video/audio timing distribution.
• Telecom line cards and MSAN/DSLAM/PON equipment.

Procurement Notes

Verify the specific B05037 factory configuration against the datasheet ordering information table to ensure correct pinout and NVM programming. Confirm that the GMR suffix matches the required reel packaging format for surface mount assembly processes.

Selection Notes

Select this model when zero ppm frequency accuracy across multiple independent clocks is required. Ensure the target application utilizes the supported output formats such as LVDS, LVPECL, HCSL, or CMOS within their respective frequency limits. Validate that the system power budget accommodates the typical 45 mA core supply current.

Part Context

This component belongs to the Si5338 family of high-performance clock generators. The 'C' designation typically indicates support for output frequencies up to 200 MHz in certain configurations, while the 'B' series denotes specific factory-programmed settings. The part replaces discrete crystal oscillators by providing a unified, programmable timing solution.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing PCB land patterns and I2C addressing schemes if considering alternative clock generators from other manufacturers.

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 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 support different signal formats and supply voltages ranging from 1.5 V to 3.3 V.

How is the device programmed?

The Si5338 is programmable via an I2C/SMBus-compatible serial interface. Skyworks provides ClockBuilder Pro software to simplify the configuration process.