MK1491-09FILN

Overview

The MK1491-09FILN is a clock/frequency synthesizer integrated circuit manufactured by Renesas Electronics Corporation, designed primarily for AMD CPU applications. It features a single circuit with a crystal input and clock output, operating at a maximum frequency of 66MHz. The device provides a 1:12 input-to-output ratio without differential signaling capabilities. It functions within a supply voltage range of 3.15V to 3.45V and supports an extended industrial operating temperature range from -40°C to +85°C. The component is housed in a 28-SSOP surface-mount package.

Feature Summary

• Integrated PLL-based clock synthesis for AMD CPU architectures
• Single circuit configuration with 1:12 input-to-output frequency ratio
• Crystal input interface generating up to 66MHz clock output
• Extended industrial temperature rating (-40°C to +85°C)

Applications

• AMD CPU clock generation systems
• Computer motherboard timing circuits
• Industrial control systems requiring stable clock signals

Procurement Notes

Verify the exact suffix designation against official Renesas documentation, as the provided model lacks the standard trailing characters found in distributor listings. Confirm RoHS compliance status and current production lifecycle stage directly with the manufacturer or authorized distributors before procurement planning.

Selection Notes

Select this component when designing for legacy AMD CPU platforms requiring a dedicated 66MHz clock source. Ensure the design accommodates the specific 3.15V–3.45V supply voltage window and utilizes a crystal oscillator input rather than a CMOS signal. Verify that the 28-SSOP footprint matches the target PCB layout constraints.

Part Context

This part belongs to the MK1491 series of application-specific clock generators. It serves as a specialized timing solution for processor families that require precise frequency multiplication from a crystal reference. The device integrates necessary synthesis logic into a compact surface-mount package to simplify system board design.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult Renesas Electronics for current alternative recommendations or obsolescence management options.