AMD Geode Clock Source
MK1491-06
AMD Geode™ Clock Source
Description
The MK1491-06 is a low-cost, low-jitter, high-performance clock synthesiz...
Description
MK1491-06
AMD Geode™ Clock Source
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. The device has multiple power-down modes to reduce power consumption.
Block Diagram
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)
...
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