SI5364-H-GL

Clock Generators, PLLs, Frequency Synthesizers Overview

The Si5364-H-GL is a SONET/SDH precision port card clock IC manufactured by Skyworks Solutions Inc. It operates from a single 3.3 V supply within an ambient temperature range of –20 °C to 85 °C. The device accepts up to three differential or single-ended reference inputs in the 19 MHz range and generates four independent synchronous clock outputs. These outputs are programmable for frequencies of 19, 155, or 622 MHz using 1x, 8x, or 32x multiplication ratios. The integrated DSPLL technology eliminates external loop filter components and supports selectable jitter transfer bandwidths of 800 Hz, 1600 Hz, 3200 Hz, and 6400 Hz.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates DSPLL technology to eliminate external loop filter components while providing selectable digital loop bandwidths.
• Supports automatic or manual hitless switching between multiple clock inputs with Stratum 3/3E and SMC compatibility.
• Provides forward and reverse FEC rate conversion through selectable 255/238 or 238/255 clock scaling factors.
• Generates ultra-low jitter clock outputs with phase transient characteristics suitable for high-speed serial communication systems.

Clock Generators, PLLs, Frequency Synthesizers Applications

• SONET/SDH line and port cards
• Terabit routers
• Core switches
• Digital cross connects

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix GL against the manufacturer's current datasheet revision to confirm package type and temperature grade. Confirm RoHS compliance status and lead times directly with authorized distributors. Ensure the selected variant matches the required operating voltage and environmental specifications for the target application design.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when designing SONET/SDH port cards requiring precise clock generation and distribution. Evaluate the available loop bandwidth settings to optimize jitter performance versus noise attenuation. Verify that the input reference frequency falls within the specified operational range for the desired output multiplication factor.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The Si5364 belongs to the Silicon Laboratories (now Skyworks) Si536x family of precision clocks designed for telecommunications infrastructure. This series provides integrated solutions for generating low-jitter clocks from standard reference frequencies without requiring complex external analog filtering components.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers: SI5364-H-BL, SI5364-H-BLR.

Clock Generators, PLLs, Frequency Synthesizers FAQ

How does the Si5364 handle clock switching?

The device supports both automatic and manually controlled hitless switching between clock inputs. It features revertive and non-revertive switching modes along with loss-of-signal and frequency offset alarms.

What is the function of the FEC control inputs?

The FEC control inputs allow for selectable 255/238 or 238/255 scaling of the clock multiplication ratios, enabling compatibility with forward error correction rates in SONET/SDH systems.

Can the Si5364 operate with single-ended clock sources?

Yes, the device can accept single-ended clock inputs. When used, unused clock inputs must be AC-coupled to ground to ensure proper operation.