18QHTF21-21.440-OE

Oscillators Overview

The 18QHTF21-21.440-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 21.44 MHz and utilizes LVCMOS output logic levels. The device functions with a supply voltage of 1.8V and includes an enable/disable control feature for power management. It is housed in a compact 4-SMD, No Lead package suitable for surface-mount assembly. The component complies with RoHS standards and has a Moisture Sensitivity Level (MSL) rating of 1, indicating unlimited floor life under standard conditions.

Oscillators Feature Summary

• LVCMOS output logic compatibility
• Integrated enable/disable control functionality
• RoHS compliant construction

Oscillators Applications

• General clock signal generation
• Digital system timing references
• Embedded controller interfaces

Oscillators Procurement Notes

Verify the specific frequency suffix matches the required 21.44 MHz specification. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the 4-SMD no-lead package dimensions fit the printed circuit board layout constraints. Check for any specific handling requirements despite the MSL level 1 rating during storage and assembly processes.

Oscillators Selection Notes

Select this component when a precise 21.44 MHz reference is needed for low-voltage digital circuits. The LVCMOS interface ensures direct compatibility with standard logic inputs without additional buffering. The enable pin allows for dynamic power saving in battery-operated devices. Consider the thermal performance and stability requirements of the application against the standard oscillator specifications provided by the manufacturer.

Oscillators Part Context

This part belongs to the QHTF series of quartz crystal oscillators produced by Mercury Electronics. The series offers various frequency options within a standardized small form factor. The 'OE' suffix typically denotes specific ordering or packaging variations defined by the manufacturer. These oscillators are designed for applications requiring stable clock signals in space-constrained electronic assemblies.

Oscillators Replacement Considerations

Direct substitutes include other 21.44 MHz LVCMOS oscillators in 4-SMD packages from compatible manufacturers. Verify electrical parameters such as supply voltage, current consumption, and output swing before substitution. Ensure mechanical footprint compatibility to avoid rework. Cross-reference pinouts to confirm enable/disable functionality mapping remains consistent.