MK1491-09FLNTR

Overview

The MK1491-09FLNTR 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 utilizes a Phase-Locked Loop (PLL) and 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 surface mount installation in a 28-SSOP package. The component operates across an industrial temperature range of 0°C to 70°C.

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
• Surface-mount 28-SSOP package compatible with standard PCB assembly

Applications

• AMD CPU clock generation systems
• Computer motherboard timing circuits
• Legacy PC hardware maintenance and repair

Procurement Notes

Verify the specific suffix 'LNTR' against official Renesas documentation to confirm packaging details and RoHS compliance status, as distributor data may vary. Confirm end-of-life or obsolescence status through manufacturer channels before procurement planning. Ensure the 28-SSOP footprint matches the target design constraints.

Selection Notes

Select this component when a dedicated 66MHz clock source for AMD processors is required. Verify that the 3.15V-3.45V supply voltage aligns with the system power rails. Consider the 0°C to 70°C operating temperature range against environmental requirements. Compare pinout compatibility if replacing existing designs.

Part Context

This part belongs to the MK1491 series of clock generators. Variants such as MK1491-09F and MK1491-09FILNTR exist with similar electrical specifications but may differ in packaging (tube vs. tape & reel) or compliance standards. The MK1491-09FLNTR specifically denotes the tape-and-reel packaging format for automated assembly.

Replacement Considerations

Direct substitutes include MK1491-09FILNTR and MK1491-09FTR, which share identical electrical characteristics. Verify package type differences; MK1491-09F is available in tube packaging while MK1491-09FTR uses tape and reel. Check RoHS compliance status as it varies between variants.