SI5338A-B04774-GMR

Overview

The SI5338A-B04774-GMR is a programmable quad clock generator utilizing MultiSynth technology. It synthesizes four independent output clocks with zero ppm precision via an I2C interface. The device supports input frequencies up to 710 MHz and generates outputs ranging from 0.16 MHz to 710 MHz depending on the selected format (LVPECL, LVDS, CML, HCSL, CMOS, SSTL, or HSTL). Key electrical parameters include a typical core supply current of 45 mA, a maximum core voltage of 3.63 V, and a typical RMS phase jitter of 0.7 ps. It operates within a temperature range of -40 °C to +85 °C in a 24-lead QFN package.

Feature Summary

• MultiSynth technology enables any-frequency synthesis with true zero ppm accuracy on four independent outputs.
• Supports flexible output formats including LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL.
• Features low phase jitter of 0.7 ps RMS typ and glitchless frequency/phase adjustments.
• Programmable via I2C/SMBus interface with support for external feedback zero-delay mode.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm factory programming configurations. The 'GMR' suffix indicates tape-and-reel packaging. Confirm that the pre-programmed frequency plan matches the target application requirements before integration.

Selection Notes

Select this component when independent, any-frequency synthesis is required for multiple clock domains. Ensure the desired output signal format (e.g., LVDS vs. CMOS) and frequency range are supported by the specific internal configuration. Verify power supply compatibility with the 1.8 V, 2.5 V, or 3.3 V core voltage options.

Part Context

This part belongs to the Si5338 family of high-performance, low-jitter clock generators. The family shares the same MultiSynth architecture and QFN-24 package but varies in factory-programmed output frequencies and signal formats. The 'A' designation typically denotes the highest performance tier within the series regarding jitter and frequency capabilities.

Replacement Considerations

Direct replacements must match the 24-QFN footprint and I2C interface. Verify that alternative Skyworks Si533x variants provide the necessary pre-programmed frequencies and output driver types. Cross-model substitution requires validation of the specific clock plan and electrical characteristics.