SI5338B-A-GM

Overview

The SI5338B-A-GM is a quad clock generator from Skyworks Solutions, utilizing MultiSynth technology for independent frequency synthesis on four output drivers. It supports any frequency up to 710 MHz with zero ppm precision and features low phase jitter of 0.7 ps RMS typical. The device accepts various input references including external crystals (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential inputs (5–710 MHz). Outputs are configurable in LVPECL, LVDS, HCSL, CMOS, SSTL, or HSTL formats, operating on a single core supply of 1.8 V, 2.5 V, or 3.3 V within the -40°C to +85°C range.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis on four differential output drivers with true zero ppm accuracy.
• Low phase jitter performance of 0.7 ps RMS typical, compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS standards.
• Flexible input reference options supporting external crystals, CMOS, SSTL/HSTL, and differential signals up to 710 MHz.
• Independently configurable outputs support multiple signal formats (LVPECL, LVDS, HCSL, CMOS, etc.) with individual voltage levels.

Applications

• Ethernet switch/router
• PCIe Gen1/2/3/4 systems
• Broadcast video/audio timing
• Processor and FPGA clocking
• MSAN/DSLAM/PON infrastructure

Procurement Notes

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

Selection Notes

Select this component when designing systems requiring independent clock frequencies with high precision and low jitter. Evaluate the required output signal formats and voltage levels to ensure the configurable drivers meet the load specifications. Confirm that the input reference source matches one of the supported types, such as differential or single-ended signals, within the specified frequency ranges.

Part Context

The SI5338B-A-GM belongs to the Si5338 family of I2C-programmable any-frequency, any-output quad clock generators. This series is designed to replace multiple discrete crystal oscillators, reducing board space and power consumption while providing flexible clock distribution solutions for high-speed digital interfaces.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify pinout and electrical specifications before considering alternative components from other manufacturers.

FAQ

What is the maximum input frequency supported by the SI5338B-A-GM?

The device supports a maximum differential input frequency of 710 MHz. Single-ended inputs are limited to lower frequencies depending on the format: CMOS up to 200 MHz and SSTL/HSTL up to 350 MHz.

Can the SI5338B-A-GM operate without an external crystal?

Yes, the device can accept external clock signals via its input pins. Supported input types include CMOS, SSTL/HSTL, and differential clocks, allowing it to function as a frequency translator or buffer without a crystal oscillator.

What is the typical phase jitter performance of this clock generator?

The SI5338B-A-GM offers a typical phase jitter of 0.7 ps RMS. This low jitter performance makes it suitable for demanding applications such as PCIe Gen 3/4 and high-speed Ethernet interfaces.