SI5338A-B11789-GM

Overview

The SI5338A-B11789-GM is a programmable quad clock generator from Skyworks Solutions. It synthesizes four independent output clocks with zero ppm precision using MultiSynth technology. The device supports a maximum input frequency of 710 MHz and generates outputs up to 710 MHz for differential formats (LVPECL, LVDS, CML) or 200 MHz for CMOS. It operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V, drawing a typical current of 45 mA. Key electrical parameters include a typical RMS jitter of 0.7 ps and an operating temperature range of -40 °C to +85 °C.

Feature Summary

• MultiSynth technology enables any-frequency synthesis with 0 ppm accuracy on four independent drivers.
• Low phase jitter performance with a typical RMS value of 0.7 ps.
• Flexible input support including external crystals (8–30 MHz), CMOS, SSTL/HSTL, and differential inputs up to 710 MHz.
• Independent output voltage configuration per driver at 1.5 V, 1.8 V, 2.5 V, or 3.3 V.

Applications

• PCIe Gen 1/2/3/4 common clock and SRNS compliant systems
• Ethernet switch and router timing
• Processor and FPGA clocking
• Broadcast video/audio timing

Procurement Notes

Verify the specific ordering suffix B11789 against the manufacturer's official documentation to confirm the exact pre-programmed frequency plan and pinout configuration. Ensure compatibility with I2C/SMBus interface requirements and check for moisture sensitivity handling instructions during assembly.

Selection Notes

Select this component when low jitter (<1 ps RMS) and high precision (0 ppm) are required for multiple clock domains. Confirm that the target application utilizes differential outputs like LVDS or LVPECL to achieve the specified 710 MHz maximum frequency; single-ended CMOS outputs are limited to 200 MHz.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. It replaces discrete crystal oscillators by providing flexible frequency translation and buffering in a compact 4x4 mm QFN-24 package. The device integrates NVM for storing configurations and supports glitchless frequency adjustments via independent increment/decrement features.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify functional equivalence regarding pinout, supply voltage, and jitter specifications if considering alternative vendors.