MAX3872ETJ+T

Ratio - Input:Output:	1:2
Base Part Number:	MAX3872
Supplier Device Package:	32-TQFN-EP (5x5)
Package / Case:	32-WFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply:	3 V ~ 3.6 V
Frequency - Max:	2.67GHz
Differential - Input:Output:	Yes/Yes
Series:	--
Number of Circuits:	1
Output:	CML
Input:	CML
Main Purpose:	Ethernet, SONET/SDH
PLL:	Yes
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

MAX3872ETJ+T from Maxim Integrated is designed for applications that require accurate clock or timing synchronization. It is a low-jitter, high-performance crystal oscillator (XO) for frequency synthesis, clock and data recovery (CDR), clock and timing synchronization, and RF data link applications.

Application Field

MAX3872ETJ+T is distributed in a number of different forms, depending on the application. For instance, it can be used as a clock synthesizer to generate localized frequencies in distributed system architectures, or as a low-jitter oscillator to improve phase and frequency stability in radio links. In clock and data recovery (CDR) applications, some of the most common applications are gigabit Ethernet, laser and optical data link, and digital PON. MAX3872ETJ+T is designed for these applications, providing high-accuracy clock recovery and synchronization, reducing jitter and eliminating timing errors. It is also an ideal solution for high-speed clock synthesis in mobile infrastructure, digital broadcast and satellite systems.

Working Principle

MAX3872ETJ+T is based on a Phase-Locked Loop (PLL) architecture. It works similarly to a Phase Frequency Detector (PFD), with a VCO at the output. The VCO is tuned by the input signal, and the output is a synthesized clock which is phase and frequency-locked to the input. The oscillator is driven by an external quartz crystal, which also determines the accuracy of the output frequency. The oscillator frequency can be adjusted by changing the external components, such as the capacitors and resistors. In addition, the oscillator can be enabled or disabled via a logic input.

Conclusion

MAX3872ETJ+T from Maxim Integrated is a low-jitter, high-performance crystal oscillator designed for applications that require accurate clock or timing synchronization. It is based on a Phase-Locked Loop (PLL) architecture and can be used as a clock synthesizer for localized frequencies in distributed system architectures, a low-jitter oscillator to improve phase and frequency stability in radio links, or a clock and data recovery component for gigabit Ethernet, laser and optical data link, and digital PON applications. It is an ideal solution for applications that require accurate clock and timing synchronization.

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