SI5338C-B05628-GM

Overview

The SI5338C-B05628-GM is a programmable quad clock generator utilizing MultiSynth technology to synthesize any frequency on four independent output drivers. It supports differential and single-ended outputs with frequencies up to 710 MHz, achieving zero ppm precision. The device features low phase jitter of 0.7 ps RMS typical, flexible input references including crystals and CMOS/SSTL/HSTL signals, and independent output voltage configurations (1.5V, 1.8V, 2.5V, or 3.3V). Powered by a single core supply (1.8V, 2.5V, or 3.3V), it operates within a -40°C to +85°C temperature range in a compact 4x4 mm QFN-24 package.

Feature Summary

• MultiSynth™ Technology: Generates four independent clocks with 0 ppm frequency accuracy.
• Flexible Output Drivers: Supports LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL formats.
• Low Jitter Performance: Typical RMS jitter of 0.7 ps for GbE and PCIe applications.
• Glitchless Frequency Adjustment: Independent frequency increment/decrement in 1 ppm steps.

Applications

• PCIe Gen 1/2/3/4 Common Clock and SRNS
• Ethernet Switch/Router (1 GbE and 10 GbE)
• Processor and FPGA Clocking
• Broadcast Video/Audio Timing

Procurement Notes

Verify the specific factory configuration code 'B05628' against the official Skyworks ordering guide to ensure correct pre-programmed register settings. Confirm that the '-GM' suffix denotes the standard tape-and-reel packaging format compatible with automated surface-mount assembly processes.

Selection Notes

Select this component when designing systems requiring multiple distinct clock frequencies from a single source. Ensure the required output signal formats (LVDS, CMOS, etc.) and voltage levels are supported by the independent VDDO supplies. Verify that the input reference frequency falls within the supported ranges for crystal, CMOS, or differential inputs.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'C' indicates the commercial temperature grade (-40°C to +85°C). The alphanumeric code following the model prefix defines the specific factory-programmed frequency plan and output configuration, distinguishing it from other variants in the series.

Replacement Considerations

Direct pin-to-pin replacements within the same package require identical pre-programmed frequency plans. Check Skyworks documentation for alternative part numbers with matching electrical characteristics and output configurations if the specific B05628 configuration is unavailable.

FAQ

What is the maximum output frequency supported by the SI5338?

The device supports output frequencies up to 710 MHz for differential formats like LVPECL, LVDS, and CML. Single-ended CMOS outputs are limited to 200 MHz.

Can the SI5338 operate without an external crystal?

Yes, it accepts external clock inputs via CMOS pins (IN3/IN4) up to 200 MHz or differential pins (IN1/2, IN5/6) up to 710 MHz, bypassing the need for an onboard crystal oscillator.

How is the device configured after manufacturing?

The SI5338C-B05628-GM comes factory-programmed with a specific clock configuration. It can also be reconfigured in-system via an I2C/SMBus-compatible serial interface using tools like ClockBuilder Pro.