18QHTF21-77.996-PD

Overview

The 18QHTF21-77.996-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd, operating at a frequency of 77.996 MHz. It utilizes LVCMOS output logic and functions with a supply voltage of 1.8V. The component supports a standby or power-down mode for energy management. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications.

Feature Summary

• Supports low-power standby operation via power-down control
• Delivers standard LVCMOS signal output
• Utilizes a leadless surface-mount package design

Applications

• General electronic timing circuits
• Digital signal processing systems
• Communication equipment clocking

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 to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this model when a precise 77.996 MHz reference is required with low-voltage compatibility. Consider the LVCMOS interface for direct digital logic integration. Evaluate the need for standby functionality if power conservation is critical. Compare physical dimensions against available board space to ensure the 4-SMD package fits within the designated area without interference.

Part Context

This component belongs to the Mercury Electronics XO series, which provides stable frequency references for various electronic devices. The manufacturer has extensive experience in quartz crystal production, ensuring reliability in frequency control products. This specific part represents a standard oscillation solution suitable for modern compact electronics requiring precise timing signals.

Replacement Considerations

Direct substitutes must match the 77.996 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and electrical characteristics before swapping. Generic replacements may differ in phase noise or startup time.