SI5338L-A-GM

Overview

The SI5338L-A-GM 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, each independently powered at 1.5, 1.8, 2.5, or 3.3 V. Key electrical parameters include a typical core supply current of 45 mA, a maximum output frequency of 710 MHz, and a typical phase jitter of 0.7 ps RMS. It operates within a temperature range of –40 °C to +85 °C in a 24-lead QFN package.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis on four differential output drivers with 0 ppm accuracy.
• Highly-configurable output drivers support LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL formats with independent voltage supplies.
• Low phase jitter performance of 0.7 ps RMS typical, compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS standards.
• Flexible input reference options including external crystals (8–30 MHz), CMOS (5–200 MHz), and differential inputs (up to 710 MHz).

Applications

• PCIe Gen 1/2/3/4 systems
• Ethernet switch/router timing
• Processor and FPGA clocking
• Broadcast video/audio timing
• Telecom line cards

Procurement Notes

Verify the specific ordering suffix 'L' against the manufacturer's official documentation to confirm pinout configuration, internal NVM programming status, or specific output enable logic variations. Ensure compatibility with the required I2C/SMBus interface levels and check for moisture sensitivity handling requirements during assembly.

Selection Notes

Select this component when independent frequency synthesis across four outputs is required without multiple crystal oscillators. Ensure the target application supports the available output voltage rails (1.5V, 1.8V, 2.5V, 3.3V) and signal formats. Verify that the input reference source matches the supported frequency ranges for CMOS, differential, or crystal inputs.

Part Context

The SI5338L-A-GM belongs to the Si5338 family of low-jitter clock generators. This series replaces discrete oscillators by providing flexible frequency translation and distribution. The 'A' suffix typically denotes a specific factory-programmed configuration or pinout variant within the broader Si5338 product line, designed for space-constrained high-performance applications.

Replacement Considerations

Consult the official Skyworks replacement guide for verified substitutes. Generic replacements may not match the MultiSynth architecture or specific jitter profiles required for PCIe compliance.