18QHTF21-9.984375-OE

Overview

The 18QHTF21-9.984375-OE is a crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 9.984375 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features an enable/disable control function. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Supports LVCMOS output logic for standard digital interfacing
• Includes enable/disable functionality for power management
• Utilizes a leadless SMD package for space-constrained designs

Applications

• General-purpose clock signal generation
• Digital system timing references
• Embedded electronics requiring stable oscillation

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead footprint matches your PCB layout constraints. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure reliable assembly.

Selection Notes

Select this component when a 9.984375 MHz clock source is required with low-voltage operation. Consider the LVCMOS interface compatibility with your downstream logic levels. Evaluate the physical dimensions of the 4-SMD package against available board space. Verify that the enable pin functionality meets your power sequencing needs.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within the same form factor. The series typically includes options ranging from approximately 9.8 MHz to over 86 MHz, all sharing similar electrical characteristics and packaging styles for consistent design integration across different frequency requirements.

Replacement Considerations

Direct substitutes may include other 18QHTF21 variants with different frequencies if the exact 9.984375 MHz is not critical. Cross-reference with other manufacturers offering 4-SMD LVCMOS oscillators at 1.8V, ensuring identical pinout and envelope dimensions for drop-in replacement.