MAX3670ETJ2

Clock Generators, PLLs, Frequency Synthesizers Overview

The MAX3670ETJ2 is a low-jitter reference clock generator IC designed for system clock distribution and frequency synchronization in OC-48 and OC-192 SONET/SDH and WDM transmission systems. It integrates a phase/frequency detector, operational amplifier, prescaler dividers, and input/output buffers. The device operates from a single +3.3V or +5.0V supply with typical power dissipation of 150mW at 3.3V. It supports external VCO center frequencies from 155MHz to 670MHz and provides PECL clock output interfaces. The operating temperature range is -40°C to +85°C, housed in a 5mm x 5mm, 32-pin QFN package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Low intrinsic jitter less than 0.4psRMS
• Programmable PLL bandwidth from 15Hz to 20kHz
• Supports external VCO center frequencies from 155MHz to 670MHz
• Loss-of-lock indicator with adjustable threshold

Clock Generators, PLLs, Frequency Synthesizers Applications

• OC-12 to OC-192 SONET/WDM Transport Systems
• Clock Jitter Clean-Up and Frequency Synchronization
• Frequency Conversion
• System Clock Distribution

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix 'ETJ2' against official Maxim Integrated documentation, as standard listings typically identify the lead-free variant as 'MAX3670ETJ+'. Confirm that the component matches the 32 Thin QFN-EP package specifications and the -40°C to +85°C temperature range before procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when designing SONET/SDH or WDM systems requiring precise clock synchronization. Ensure compatibility with external VCOs having gain transfer functions between 155MHz and 670MHz. Verify that the required loop bandwidth settings align with the programmable range of 15Hz to 20kHz using external filter components.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The MAX3670 is part of Maxim Integrated's family of low-jitter clock generators optimized for high-speed digital communication networks. It serves as a core timing solution for synchronizing serializers and deserializers in optical transport equipment, ensuring signal integrity across OC-48 and OC-192 data rates.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided datasheet.