NCT1781Y TR

Overview

The NCT1781Y is a voltage level shift IC designed for clock generation and distribution. It accepts a 27MHz input from a crystal or frequency source to generate two outputs: a buffered 27MHz signal and a 100MHz signal utilizing spread spectrum techniques. The device operates on a single 3.3V power supply and achieves a frequency precision of ±30ppm for both outputs, meeting requirements for GPU applications. Housed in a 10-pin DFN package, it minimizes system EMI emissions while maintaining high timing accuracy.

Feature Summary

• Generates 3.3V 27MHz buffered output and 3.3V 100MHz spread spectrum output
• Supports nine selectable spread spectrum types and ranges to reduce EMI
• Maintains frequency precision of ±30ppm for both output frequencies
• Operates with a single 3.3V power supply

Applications

• GPU clock generation systems
• Systems requiring EMI reduction via spread spectrum
• Voltage level shifting for clock signals

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and tape-and-reel configuration. Ensure the component meets environmental standards such as halogen-free requirements specified for the green package.

Selection Notes

Select this component when a stable 100MHz clock with spread spectrum capabilities is required alongside a direct 27MHz buffer. Confirm that the ±30ppm frequency tolerance aligns with the target application's jitter and stability specifications.

Part Context

The NCT1781Y belongs to Nuvoton's portfolio of specialized timing and interface solutions. It addresses the need for precise clock distribution in computing environments where electromagnetic interference must be managed through spread spectrum modulation.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.