Description

The MK1491-06 is a low-cost, low-jitter, high-performance clock synthesizer for AMD’s Geode-based computer and portable appliance applications. Using patented analog Phased-Locked Loop (PLL) techniques, the device accepts a 14.318 MHz crystal input to produce multiple output clocks. It provides selectable PCI local bus and AC97 audio clocks, 24 MHz and 48 MHz clocks for Super I/O and USB, as well as multiple Reference outputs.

Features

• Packaged in 28-pin SOIC or in 28-pin SSOP

• Available in Pb (lead) free

• Provides all critical timing for the AMD Geode companion chip

• Four PCI clocks

• Selectable PCIF on up to 2 outputs

• Early PCI clock selectability

• Up to 4 Reference clocks

• 48 MHz USB and 24MHz SIO support

• AC97 audio clock

• Multiple power down modes

• Low EMI Enable pin reduces EMI radiation on PCI clocks (patented)

• Operating voltage of 3.3 V ±5%