SI5325A-C-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5325A-C-GM is a low-jitter, precision clock multiplier manufactured by Skyworks Solutions Inc. It accepts dual clock inputs ranging from 10 to 710 MHz and generates two clock outputs ranging from 10 to 945 MHz, with select frequencies reaching up to 1.4 GHz. The device features an integrated loop filter with selectable bandwidths between 150 kHz and 2 MHz. It supports manual or automatically controlled hitless switching between dual inputs and provides digitally-controlled output phase adjustment. The component operates on a single supply voltage via an on-chip regulator for 1.8 V, 2.5 V, or 3.3 V ±10% operation.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Generates any frequency from 10 to 945 MHz (select frequencies to 1.4 GHz) from input frequencies of 10 to 710 MHz
• Low jitter performance with jitter generation as low as 0.6 ps rms (30 kHz–1.3 MHz)
• Dual clock inputs with manual or automatic hitless switching capabilities
• Digitally-controlled output phase adjustment and I2C/SPI programmability

Clock Generators, PLLs, Frequency Synthesizers Applications

• SONET/SDH OC-48/OC-192 line cards
• GbE/10GbE and 1/2/4/8/10GFC line cards
• ITU G.709 and custom FEC line cards
• Optical modules
• Wireless basestations

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5325 family of precision clock multipliers. Unlike the Si5325B variant which functions as a jitter attenuator, the Si5325A series is designed specifically for applications requiring clock multiplication without jitter attenuation. It utilizes a common source for separate output division to support virtually any frequency translation combination within its operating range.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What are the supported output signal formats?

The device provides dual clock outputs with selectable signal formats including LVPECL, LVDS, CML, and CMOS.

Does the Si5325A include an external loop filter?

No, the device features an integrated loop filter with selectable loop bandwidth options ranging from 150 kHz to 2 MHz.

How does the device handle input switching?

It supports dual clock inputs with either manual or automatically controlled hitless switching.