MAX3625B: Precision timing for high-speed data communications

11th December 2009
Posted By : ES Admin
MAX3625B: Precision timing for high-speed data communications
Maxim has introduced the MAX3625B high-performance, three-output clock generator for Ethernet and Fibre Channel equipment. This device utilizes a low-noise VCO and PLL architecture to generate a high-frequency, ultra-low-jitter (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% and is fully specified over the -40 degrees Celsius to +85 degrees Celsius extended temperature range. It is available in a small, 7.8mm x 4.4mm, lead-free, 24-pin TSSOP package. Prices start at $7.35 (1000-up, FOB USA).


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