SI5338C-B04382-GMR

Overview

The SI5338C-B04382-GMR is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology for independent frequency synthesis. It supports four outputs with configurable formats including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL. The device operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V and accepts differential inputs up to 710 MHz. Key electrical parameters include a typical RMS jitter of 0.7 ps, a maximum output frequency of 710 MHz, and an operating temperature range of -40°C to +85°C.

Feature Summary

• MultiSynth™ technology enables zero ppm precision and independent any-frequency synthesis on four outputs.
• Supports flexible input references: external crystals (8-30 MHz), CMOS (5-200 MHz), and differential signals (up to 710 MHz).
• Features glitchless frequency adjustments via independent increment/decrement pins and phase adjustment accuracy < 20 ps.
• Configurable spread spectrum modulation with adjustable deviation (0.5% to 5.0%) and modulation rates (33 to 63 kHz).

Applications

• PCIe Gen 1/2/3/4 common clock and SRNS compliant timing.
• Ethernet switch/router and 1 GbE/10 GbE interfaces.
• Processor and FPGA clocking systems.
• Broadcast video/audio timing distribution.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and shipping configuration. Ensure compatibility with I2C/SMBus interface requirements and check for moisture sensitivity handling instructions prior to assembly.

Selection Notes

Select this component when low-jitter (< 1 ps RMS) performance is required for high-speed serial links like PCIe or Ethernet. Confirm that the desired output voltage levels (1.5 V, 1.8 V, 2.5 V, or 3.3 V) match the load requirements. Use ClockBuilder Pro software for register configuration and validation of jitter specifications.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. It replaces multiple discrete crystal oscillators by providing four independent clock outputs from a single reference source. The device integrates a PLL and MultiSynth dividers to achieve precise frequency translation and format conversion.

Replacement Considerations

Direct pin-to-pin replacements within the same series may include variants with different output configurations or packaging options. Verify that substitute parts support the required input frequencies and output drive strengths before implementation.

FAQ

What is the maximum input frequency supported by the differential inputs?

The differential inputs (IN1/2, IN5/6) support a maximum input frequency of 710 MHz.

Can the device operate in buffer mode without the PLL?

Yes, the Si5338 supports a clock buffer mode (PLL bypass) where the input signal is passed directly to the outputs, supporting frequencies down to 1 MHz.

How is the output voltage level configured?

Each output driver has an independent supply pin (VDDOx) that allows setting the output voltage level to 1.5 V, 1.8 V, 2.5 V, or 3.3 V.