18QHTF21-77.673-OE

Overview

The 18QHTF21-77.673-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 77.673 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes enable/disable functionality. It is housed in a compact 4-SMD, No Lead package. This component is designed for precise timing applications requiring low power consumption and small form factors.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated enable and disable control function
• Compact surface-mount package design

Applications

• General purpose clock generation
• Digital signal processing timing
• Embedded system clock sources

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 package footprint matches your PCB layout specifications to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this model when a low-voltage 1.8V operation is required alongside standard LVCMOS signaling. The enable/disable feature allows for power management in battery-operated devices. Consider the 4-SMD package size if space constraints are critical. Verify that the 77.673 MHz frequency meets the exact timing needs of the target application without requiring external dividers or multipliers.

Part Context

This part belongs to the Mercury Electronics XO series, which focuses on standard crystal oscillators. The series offers various frequencies and packages tailored for different electronic applications. Mercury Electronics has a long history in quartz crystal manufacturing, providing reliable frequency control solutions. This specific model represents their capability in producing precise, low-power oscillators for modern electronics.

Replacement Considerations

Direct substitutes must match the 77.673 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Check pinout compatibility and electrical characteristics such as phase noise and jitter if specified in official datasheets. Generic replacements may not support the enable/disable function.