MAX9489

Multiple-Output Network Clock Generator

Clock Generator Provides Multiple Clock Outputs Ideal for Network Routers

Viewing:

Overview

15 LVCMOS Outputs with 10 Independently Programmable Frequencies: 133MHz, 125MHz, 100MHz, 83MHz, 80MHz, 66MHz, 62.5MHz, 50MHz, 33MHz, and 25MHz
25MHz Crystal or Clock Input Reference
Programmable Through I²C Interface
Programmable Output Frequency Margin of ±5% or ±10%
Pin-Selectable Power-Up Frequency for CLK1 Output: 100MHz, 125MHz, or 133MHz
Low Output Period Jitter: < 48ps_RMS
Output-to-Output Skew < 200ps
Available in 32-Lead, 5mm x 5mm x 0.8mm, Thin QFN Package
Operates from +3.0V to +3.6V Power Supply
Power Dissipation 450mW (typ)
Extended Temperature Range: -40°C to +85°C

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 are then programmable to any available frequency through the I²C interface. Additionally, all output frequencies 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. The MAX9489 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.

Applications