18QHTF21-81.900-OE

Overview

The 18QHTF21-81.900-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 81.9 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage of 1.8V and includes an enable/disable control function for power management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Supports active enable and disable control via dedicated pin
• Utilizes LVCMOS output interface for digital compatibility
• Designed for low-voltage operation at 1.8V

Applications

• General-purpose clock signal generation
• Embedded system timing references
• Consumer electronics circuit boards

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your design specifications before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package footprint matches your PCB layout to avoid assembly issues. Cross-reference the manufacturer datasheet for detailed electrical characteristics and reliability data.

Selection Notes

Select this component when a stable 81.9 MHz reference is required for LVCMOS-compatible circuits. Consider the 1.8V operating voltage constraint during power budget analysis. Evaluate the enable/disable feature if dynamic power saving is necessary. Compare package dimensions against available board space to ensure mechanical fit within the target application environment.

Part Context

This oscillator belongs to the Mercury 18QHTF series, characterized by small form factors and low power consumption. The series typically offers various frequencies and voltage options. The 'OE' suffix indicates the presence of an output enable pin, providing additional control flexibility compared to standard continuous-output oscillators in the same family.

Replacement Considerations

Direct substitutes must match the 81.9 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility, particularly the enable pin configuration. Check equivalent jitter and stability specifications to ensure performance parity in the target circuit.