18QHTF21-38.888-PD

Oscillators Overview

The 18QHTF21-38.888-PD is a crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 38.888 MHz with LVCMOS output logic and a supply voltage of 1.8V. The device features a Standby (Power Down) control function and is housed in a 4-SMD, No Lead package.

Oscillators Feature Summary

• LVCMOS output logic for standard digital interfacing
• Standby mode capability via Power Down control pin
• Compact 4-SMD No Lead surface mount package

Oscillators Applications

• General purpose clock signal generation
• Digital system timing references
• Embedded electronics requiring low voltage operation

Oscillators 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 PCB footprint matches the 4-SMD No Lead package dimensions specified in the official datasheet to guarantee proper soldering and mechanical stability during assembly.

Oscillators Selection Notes

Select this component when a precise 38.888 MHz clock source is required for LVCMOS-compatible circuits. The choice is driven by the need for a low-voltage 1.8V operating profile and the inclusion of a power-down feature for energy management. Consider the small form factor of the 4-SMD package for space-constrained designs.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal frequency control products. The manufacturer has a long history in Taiwan's quartz industry. This specific model represents a standard XO variant within their portfolio, designed for reliable performance in consumer and industrial electronic applications.

Oscillators Replacement Considerations

Direct substitutes must match the 38.888 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD No Lead package. Verify pinout compatibility and electrical specifications such as phase noise and jitter if available in public documentation.