18QHTF21-72.400-PD

Overview

The 18QHTF21-72.400-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd, operating at a fixed frequency of 72.4 MHz. It utilizes LVCMOS output logic and functions with a supply voltage of 1.8V. The device features a power-down capability for standby mode control. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component serves as a precise timing source for digital circuits requiring low-voltage operation and minimal footprint.

Feature Summary

• LVCMOS output logic for direct interface with digital components
• Integrated power-down function for standby mode management
• Compact 4-SMD no-lead surface mount package design

Applications

• General purpose clock generation for embedded systems
• Timing reference for low-voltage digital signal processing
• Clock source for communication interfaces requiring 72.4 MHz stability

Procurement Notes

Verify the specific ordering suffix to ensure the correct package variant and tape-and-reel configuration match your assembly requirements. Confirm that the 1.8V supply voltage aligns with your system's power rails before integration. Check for any specific handling instructions related to the small form factor SMD package during placement.

Selection Notes

Select this model when a 72.4 MHz frequency is strictly required alongside a 1.8V operating voltage. The choice is appropriate for designs prioritizing a small 2.0x1.6mm footprint over larger packages. Ensure the application does not require spread-spectrum capabilities or alternative output logic types such as HCMOS or LVDS.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on low-voltage crystal oscillators. The series typically offers various frequencies within a standardized small outline package. It complements other Mercury products like TCXOs and VCTCXOs for applications needing higher stability or temperature compensation.

Replacement Considerations

Direct substitutes must maintain the 72.4 MHz frequency, 1.8V supply, and LVCMOS output. Verify pin compatibility and thermal characteristics if replacing with parts from different manufacturers. Cross-reference with other Mercury models in the same series for identical electrical specifications.