18QHTF21-25.390-OE

Oscillators Overview

The 18QHTF21-25.390-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fundamental frequency of 25.39 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features an active enable/disable control function to manage power consumption during idle periods. The component is housed in a compact 4-SMD, no lead package, suitable for surface-mount assembly on printed circuit boards.

Oscillators Feature Summary

• LVCMOS output logic for digital interface compatibility
• Active enable/disable control functionality
• Low voltage operation at 1.8V

Oscillators Applications

• General purpose clock signal generation
• Digital system timing references
• Embedded controller clock sources

Oscillators Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure the correct pinout and electrical characteristics are selected. Confirm that the 1.8V supply requirement aligns with the target system design before procurement. Check for any recent revisions to the datasheet regarding mechanical dimensions or thermal specifications.

Oscillators Selection Notes

Select this component when a precise 25.39 MHz reference is required for LVCMOS-compatible circuits. The enable/disable feature makes it suitable for battery-powered or power-sensitive designs where standby current reduction is necessary. Ensure the PCB layout supports the 4-SMD package footprint and that the 1.8V rail has sufficient noise margin.

Oscillators Part Context

This part belongs to the Mercury Electronics 18QHTF series of surface-mount crystal oscillators. The series offers various frequencies and voltage options. The -OE suffix typically denotes the enable/disable control variant within this product line, distinguishing it from continuous-output models.

Oscillators Replacement Considerations

Direct substitutes include other 25.39 MHz LVCMOS oscillators with 1.8V supply and enable pins. Verify package compatibility (4-SMD, no lead) and pin assignment before swapping. Cross-reference with similar Mercury parts like the 18QHTF21-25.390-PD if power-down behavior differs.