18QHTF21-13.888889-PD

Overview

The 18QHTF21-13.888889-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 13.888889 MHz and utilizes LVCMOS output logic. The device requires a supply voltage of 1.8V and features a power-down standby mode for energy efficiency. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby functionality via power-down control
• Designed for low-voltage operation at 1.8V

Applications

• General timing clock generation in electronic circuits
• Embedded systems requiring precise frequency references
• Portable devices utilizing low-power oscillators

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Ensure that the 1.8V supply rail is stable to maintain signal integrity. Confirm that the PCB footprint matches the 2.0x1.6mm SMD package specifications to avoid assembly issues during manufacturing.

Selection Notes

Select this component when a precise 13.888889 MHz reference is required in space-constrained applications. The choice is driven by the need for low voltage operation and the inclusion of a power-down feature. Consider the small form factor suitable for high-density board layouts.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on miniature surface-mount oscillators. The series typically offers various frequencies within a standardized 2.0x1.6mm footprint. It serves as a timing source for microcontrollers and communication interfaces requiring stable clock signals.

Replacement Considerations

Direct substitutes must match the 13.888889 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD No Lead package. Verify pinout compatibility and thermal characteristics if replacing with components from other manufacturers.