SI5338C-B05720-GMR

Overview

The SI5338C-B05720-GMR is a programmable quad clock generator from Skyworks Solutions. It synthesizes four independent output clocks with zero ppm frequency accuracy using MultiSynth technology. The device supports differential and single-ended outputs, including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL formats. It operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V, with individual output drivers configurable for 1.5 V, 1.8 V, 2.5 V, or 3.3 V. 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 to +85 °C.

Feature Summary

• MultiSynth technology enables any-frequency synthesis with 0 ppm precision on four independent outputs.
• Flexible output drivers support LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL signal formats.
• Independent output voltage selection per driver: 1.5 V, 1.8 V, 2.5 V, or 3.3 V.
• Glitchless frequency adjustments via independent increment/decrement features in 1 ppm steps.

Applications

• PCIe Gen 1/2/3/4 common clock and 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 current documentation to confirm pinout assignments and factory programming configurations. Ensure I2C pull-up voltages are compatible with the selected bus standard by checking register settings if the voltage is below 2.5 V.

Selection Notes

Select this component when multiple distinct clock frequencies are required from a single package. Verify that the desired output signal formats (LVDS, LVPECL, etc.) match the available driver capabilities. Confirm that the input reference source (crystal, CMOS, or differential) falls within the supported frequency ranges.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. It replaces discrete crystal oscillators and frequency translators. The device integrates a PLL and MultiSynth dividers to generate precise clock signals while maintaining low power consumption and a compact 4x4 mm QFN-24 footprint.

Replacement Considerations

Consult the official datasheet for confirmed substitute part numbers within the Si5338 family. Verify compatibility regarding output drive strength, jitter performance, and I2C configuration requirements before substitution.

FAQ

What is the maximum input frequency supported by the SI5338?

The device supports a maximum differential input frequency of 710 MHz. Single-ended inputs support up to 200 MHz (CMOS) or 350 MHz (SSTL/HSTL).

Can the output drivers operate at different supply voltages?

Yes, each of the four output drivers can be independently configured to operate at 1.5 V, 1.8 V, 2.5 V, or 3.3 V, separate from the core supply voltage.

How does the device handle frequency changes during operation?

It features an independent frequency increment/decrement capability that allows glitchless frequency adjustments in 1 ppm steps.