MK1491-09F

Overview

The MK1491-09F is a clock and frequency synthesizer integrated circuit manufactured by Renesas Electronics Corporation, designed specifically for AMD CPU applications. It features a single circuit with a crystal input and generates up to twelve clock outputs in a 1:12 ratio. The device operates at a maximum frequency of 66MHz and requires a supply voltage between 3.15V and 3.45V. It includes an internal PLL and supports surface mount installation in a 28-SSOP package (0.209 inch width). The component functions within an operating temperature range of 0°C to 70°C.

Feature Summary

• Designed for AMD CPU clock generation
• Single circuit with 1:12 input-to-output ratio
• Maximum frequency of 66MHz
• Integrated PLL with crystal input

Applications

• AMD CPU clock synchronization
• Frequency synthesis for processor systems
• System timing circuits

Procurement Notes

This component is listed as obsolete or discontinued by the manufacturer. Verification of current availability through authorized distributors is required before procurement planning. Ensure compliance with end-of-life management protocols when sourcing this part for new designs or maintenance replacements.

Selection Notes

Select the MK1491-09F only if the design requires a dedicated clock synthesizer for AMD CPUs with a 66MHz maximum output. Verify that the system power supply can maintain the required 3.15V to 3.45V range. Confirm that the 28-SSOP package dimensions fit the PCB layout constraints and that the 0°C to 70°C operating temperature range meets environmental requirements.

Part Context

The MK1491-09F belongs to the MK1491 series of application-specific clock generators. It is part of Renesas' portfolio of timing solutions tailored for legacy computing architectures. The 'F' suffix typically denotes a specific packaging or tape-and-reel variant within the product line, distinct from other suffixes like 'TR' or 'FILNTR' which may have different environmental ratings or packaging formats.

Replacement Considerations

As the MK1491-09F is discontinued, direct substitutes are not explicitly listed in the provided data. Designers should evaluate modern clock synthesizers from Renesas or other manufacturers that support AMD CPU interfaces, ensuring compatibility with voltage levels, package types, and frequency specifications.