18QHTF21-69.740-OE

Overview

The 18QHTF21-69.740-OE is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 69.74 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.

Feature Summary

• Supports LVCMOS output logic for standard digital interfacing
• Features integrated enable and disable control functionality
• Utilizes a low-profile 4-SMD, No Lead surface mount package

Applications

• General clock signal generation in electronic circuits
• Timing reference sources for digital systems
• Embedded system clock inputs

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the 4-SMD footprint matches the PCB layout specifications to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this component when a precise 69.74 MHz timing source is required with low voltage operation. Consider the LVCMOS interface compatibility with downstream logic levels. Evaluate the physical dimensions of the 4-SMD package against available board space constraints. Verify thermal operating range suitability for the intended environment.

Part Context

This part belongs to the Mercury Electronics XO series, characterized by standardized frequencies and surface mount packaging. The model number indicates a specific frequency variant within the broader product line. It shares common electrical characteristics with other units in the series, differing primarily in the designated oscillation frequency.

Replacement Considerations

Direct substitutes must match the 69.74 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Cross-reference pinouts and enable logic polarity with alternative manufacturers to ensure functional equivalence without circuit modification.