MAX9489

The MAX9489 clock generator provides multiple clock outputs, ideal for network routers. The MAX9489 provides 15 buffered clock outputs, each independently programmable to any of 10 individual frequencies: 133MHz, 125MHz, 100MHz, 83MHz, 80MHz, 66MHz, 62.5MHz, 50MHz, 33MHz, or 25MHz. All of the outputs are single-ended LVCMOS. The MAX9489 is controlled through its I2C™ interface.

At power-up, the frequency of output CLK1 is set by the tri-level input SEL to 100MHz, 125MHz, or 133MHz, while all other outputs are logic low. All outputs of MAX9489 are then programmable to any available frequency through the I2C interface. Additionally, all output frequencies of MAX9489 are adjustable up or down, by a margin of 5% or 10%, through the I2C interface.

The MAX9489 requires a 25MHz reference that can be either a crystal or an external clock signal. TheMAX9489 requires a +3.0V to +3.6V power supply and is available in a 32-pin thin QFN package with an exposed pad for heat removal.