Frequency Synthesizer with Intelligent Dynamic Switching Provides Sub-Picosecond Jitter for High-End Servers

Maxim Integrated Products (NASDAQ: MXIM) introduces the MAX3678 low-jitter frequency synthesizer with nine LVPECL clock outputs and intelligent dynamic switching. This device generates up to a 333MHz clock output from a low, 66.6MHz reference clock input. It utilizes low-noise VCO and PLL architecture to ensure low 0.30ps_RMS jitter (12kHz to 20MHz) with -60dBc power-supply noise rejection. The MAX3678 thus eases system-timing design and increases reliability, making it ideal for high-speed synchronized applications such as high-end server memory and CPU clock generation.

Configured through its pins or I²C interface, the MAX3678 generates two different frequencies to provide both a memory-module reference clock and a CPU clock. This feature eliminates the need for an expensive high-frequency oscillator, as well as a fanout buffer, thus saving board space and overall BOM.


The MAX3678 is fully specified over the 0°C to +85°C extended temperature range, and operates from 3.3V ±5%. It is available in a lead-free, 56-pin TQFN package. Prices start at $16.00 (1000-up, FOB USA). An evaluation kit is available to speed design.

Maxim Integrated Products is a publicly traded company that designs, manufactures, and sells over $2 billion of high-performance semiconductor products annually. It was founded over 25 years ago with the mission to deliver innovative analog and mixed-signal engineering solutions that add value to its customers' products. To date, Maxim has developed over 5800 products serving the industrial, communications, consumer, and computing markets. For more information, go to www.maxim-ic.com.

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