SI5338H-B-GMR

Overview

The SI5338H-B-GMR is a programmable quad clock generator from Skyworks Solutions, 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. The device operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V and features low phase jitter of 0.7 ps RMS typical. It accepts various input references including external crystals (8–30 MHz), CMOS (up to 200 MHz), SSTL/HSTL (up to 350 MHz), and differential inputs (up to 710 MHz). Configuration is performed via an I²C/SMBus interface.

Feature Summary

• MultiSynth™ technology enables zero ppm precision frequency synthesis on four independent outputs.
• Supports flexible output formats: LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL.
• Low phase jitter performance of 0.7 ps RMS typical.
• Programmable spread spectrum (SSC) with adjustable deviation and modulation rate.

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 current datasheet revision to confirm package type and shipping configuration. Ensure compatibility with the intended I²C bus voltage levels, as the device supports standard and fast mode operations across varying supply voltages.

Selection Notes

Select this component when independent frequency synthesis for multiple domains is required within a single footprint. Consider the available output driver formats and supply voltages (1.5 V to 3.3 V per driver) to match load requirements. Verify input reference constraints, particularly if using high-frequency differential inputs exceeding 350 MHz.

Part Context

The SI5338 series replaces discrete crystal oscillators and frequency translators in compact designs. It integrates a PLL and MultiSynth stages into a 4x4 mm QFN-24 package. The 'H' suffix typically denotes specific factory programming or configuration variants within the Si5338 family, requiring verification of the exact frequency plan in the associated data sheet.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Cross-referencing requires matching pinout, electrical specifications, and programmed frequency tables from the original design.