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Clock generator fits Ethernet, Fibre Channel

Posted: 22 Dec 2009 ?? ?Print Version ?Bookmark and Share

Keywords:clock generator? Ethernet? Fibre Channel?

MAX3625B clock generator

Maxim Integrated Products unveils a three-output clock generator for Ethernet and Fibre Channel equipment. The MAX3625B uses a low-noise voltage-controlled oscillator and PLL architecture to generate a high-frequency, ultralow-jitter of 0.36psRMS clock signal from a low-frequency crystal resonator or reference clock input. Its -57dBc PSNR minimizes jitter degradation and eases design in noisy system environments.

The MAX3625B eliminates the expensive crystal oscillator and fanout buffer required by conventional solutions, as it only requires an external, AT-cut fundamental-mode crystal. Because it reduces the space requirements and cost of the total clock-distribution solution, this device is well suited for applications such as Ethernet switches/routers and storage-area network switches.

To further reduce the overall BOM, the MAX3625B provides three LVPECL outputs up to 320MHz from two output-divider banks. The output dividers are programmable, allowing designers to set these outputs to the frequencies required by their application.

The MAX3625B operates from 3.3V 5 percent and is fully specified over the -40C to +85C extended temperature range. It is available in a 7.8mm x 4.4mm, Pb-free, 24-pin TSSOP package. Prices start at $7.35 (1,000-up, FOB USA).

For application notes on clock generator click here.

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