Date: 04/08/2009

Maxim's multiple-output clock generators for high-speed networking applications

Maxim has introduced the MAX3627/MAX3629 low-jitter clock generators for high-speed networking applications.

The MAX3627 has seven LVDS outputs and one LVCMOS output, and the MAX3629 has five LVDS outputs and three LVCMOS outputs, with a low-noise crystal oscillator and PLL architecture to generate high-frequency (312.5MHz), ultra-low-jitter (0.14psRMS) clock signals from a 25MHz crystal or reference clock input.

The MAX3627/MAX3629 generate two pin-selectable frequencies for both Ethernet port clocking and MAC clocking. This function features to eliminate the need for an expensive high-frequency oscillator and a fanout buffer, thus saving board space and cost. With a power-supply noise rejection (PSNR), both the MAX3627 and MAX3629 minimize jitter degradation in noisy power-supply environments, and minimizing overall jitter degradation for increased quality of system timing design.

MAX3627/MAX3629 are ideal for Ethernet interface applications, such as switches and routers, and other high-speed data-communication systems that require a low-jitter Ethernet frequency.

Operating temperature range: 0°C to +70°C
Operating voltage: 3.3V ±5%
Package: lead-free, 32-pin TQFN package
Price: starting at $8.80 for 1k pieces.