SI5338C-B05390-GM

Overview

The Skyworks SI5338C-B05390-GM is a programmable 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 0 ppm precision. The device operates from a 1.8 V, 2.5 V, or 3.3 V core supply with a typical current of 45 mA. Key electrical parameters include a maximum input frequency of 710 MHz, a typical phase jitter of 0.7 ps RMS, and an operating temperature range of -40 °C to +85 °C. It is housed in a compact 4 x 4 mm QFN-24 package.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four output drivers with 0 ppm accuracy.
• Supports flexible input references including external crystals (8–30 MHz), CMOS (up to 200 MHz), and differential inputs (up to 710 MHz).
• Features low phase jitter of 0.7 ps RMS typ and glitchless frequency adjustments via independent increment/decrement features.
• Configurable spread spectrum (SSC) allows modulation rates from 33 to 63 kHz with spreads between 0.5% and 5.0%.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest documentation to confirm pinout compatibility and factory configuration. Ensure I2C pull-up voltages align with the selected VDDI2C level, as register adjustments may be required for voltages below 2.5 V. Confirm moisture sensitivity handling procedures prior to assembly.

Selection Notes

Select this component when zero ppm frequency accuracy across multiple independent clocks is required. Ensure the target output format (LVPECL, LVDS, HCSL, CMOS, etc.) matches the load requirements, as individual driver supplies can be configured independently. Verify that the input reference source falls within the supported frequency ranges for the desired output configuration.

Part Context

This part belongs to the Si5338 family of I2C-programmable quad clock generators. It replaces discrete crystal oscillators by synthesizing frequencies internally. The 'C' designation typically indicates a specific frequency configuration or output capability variant within the broader Si5338 product line, distinct from other suffixes like 'A' or 'B'.

Replacement Considerations

Direct replacements must support the same 24-QFN package and I2C interface. Verify that alternative devices offer comparable jitter performance (<1 ps RMS) and support the required output voltage levels. Check if the substitute supports the specific PCIe compliance standards if used in such applications.