18QHTF21-78.800-OE

Overview

The 18QHTF21-78.800-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 78.8 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes enable/disable control capabilities. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.

Feature Summary

• Provides stable clock signals using LVCMOS output logic
• Features integrated enable and disable functionality for power management
• Utilizes a leadless SMD package for automated assembly

Applications

• Digital signal processing systems
• Communication equipment timing circuits
• Embedded system clock generation

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before procurement. Ensure the 1.8V supply voltage aligns with the target circuit design. Confirm that the LVCMOS output levels are compatible with the receiving logic inputs to prevent signal integrity issues during integration.

Selection Notes

Select this component when a 78.8 MHz reference clock is required for LVCMOS-compatible digital circuits. Consider the 1.8V operating voltage constraint and the need for software-controllable enable features. Evaluate the 4-SMD no-lead footprint against available PCB space and soldering capabilities within the target application environment.

Part Context

This model belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based frequency control products. The manufacturer has decades of experience in producing oscillators and filters. This specific part represents a standard XO variant optimized for general-purpose timing applications in consumer and industrial electronics.

Replacement Considerations

Direct replacements must match the 78.8 MHz frequency, 1.8V supply, and LVCMOS output type. Verify pin compatibility and thermal characteristics. Cross-reference with other Mercury 18QHTF21 variants or industry-standard equivalents ensuring identical electrical parameters and mechanical dimensions.