SI5338C-B04858-GMR

Overview

The SI5338C-B04858-GMR is an I2C-programmable quad clock generator from Skyworks Solutions. It utilizes MultiSynth technology to synthesize any frequency on four independent output drivers with zero ppm precision. The device supports a wide range of input references, including external crystals (8–30 MHz), CMOS (5–200 MHz), and differential inputs up to 710 MHz. Outputs are configurable for LVPECL, LVDS, HCSL, CMOS, SSTL, or HSTL formats, with individual supply voltages of 1.5, 1.8, 2.5, or 3.3 V. It operates on a single core supply of 1.8, 2.5, or 3.3 V, draws 45 mA typically, and functions within a temperature range of –40 to +85 °C in a 4x4 mm QFN-24 package.

Feature Summary

• Four independent output drivers supporting any frequency synthesis with 0 ppm accuracy
• Low phase jitter performance of 0.7 ps RMS typical
• Flexible input options: crystal, CMOS, SSTL/HSTL, and differential (up to 710 MHz)
• Configurable output formats including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL

Applications

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

Procurement Notes

Verify the specific ordering suffix B04858 against the manufacturer's official documentation to confirm the programmed frequency plan and output configuration. Ensure the I2C pull-up voltage compatibility is addressed if operating below 2.5 V by writing to register 27. Confirm that the required output signal formats and supply voltages match the device's configurable capabilities.

Selection Notes

Select this component when multiple distinct clock frequencies are required from a single IC. It replaces discrete oscillators and frequency translators. Ensure the design accommodates the 4x4 mm QFN-24 package thermal requirements. Verify that the target application supports I2C programming or utilizes the internal OTP memory for fixed configurations.

Part Context

This part belongs to the Si5338 family of low-jitter clock generators. The 'C' indicates a specific commercial grade or variant within the series, while 'B04858' denotes a factory-programmed frequency plan. The '-GMR' suffix specifies tape and reel packaging. The device is manufactured by Skyworks Solutions, Inc., formerly Silicon Laboratories.

Replacement Considerations

Direct replacements must be sought from the Si5338 family datasheet. Other variants such as SI5338Q or SI5338K may offer different feature sets like pin control or higher frequency ranges. Verify electrical compatibility and pinout before substitution.