MK1491-06RILF

Overview

The MK1491-06RILF is a clock synthesizer designed for AMD Geode-based computer and portable appliance applications. It utilizes analog Phase-Locked Loop (PLL) techniques to accept a 14.318 MHz crystal input and generate multiple output clocks, including selectable PCI local bus, AC97 audio, 24 MHz, and 48 MHz clocks. The device operates within a supply voltage range of 3.15V to 3.45V and supports a maximum frequency of 49.152MHz. It features low EMI capabilities and multiple power-down modes to reduce consumption.

Feature Summary

• Generates critical timing for AMD Geode companion chips, including four PCI clocks and AC97 audio support.
• Features a patented Low EMI Enable pin that reduces electromagnetic interference radiation on PCI clocks.
• Supports selectable PCIF functionality on up to two outputs with early PCI clock selectability.
• Includes multiple power-down modes controlled by PWRDWN#, PCISTP#, and SLOW# pins.

Applications

• AMD Geode-based desktop computers
• Portable appliances utilizing AMD Geode processors
• Systems requiring specific PCI and USB clock generation

Procurement Notes

Verify the industrial temperature rating (-40°C to +85°C) associated with the 'I' suffix in the part number MK1491-06RILF. Confirm RoHS compliance status as indicated by the 'LF' suffix. Ensure the package type matches the required 28-pin SSOP form factor for the target PCB design.

Selection Notes

Select this component when designing for AMD Geode platforms requiring integrated clock synthesis. Compare against commercial variants if the operating environment exceeds -40°C. Verify that the 1:10 input-to-output ratio and LVCMOS output levels align with system logic requirements.

Part Context

This part belongs to the MK1491 series of clock synthesizers originally manufactured by IDT and later acquired by Renesas Electronics Corporation. The 'RILF' suffix specifically denotes the 28-pin SSOP package, industrial temperature range, and lead-free/RoHS compliant construction.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.