18QHTF21-13.900-PD

Overview

The 18QHTF21-13.900-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 13.9 MHz with LVCMOS output logic. The device requires a 1.8V supply voltage and features a power-down function for standby mode control. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Includes power-down capability for energy efficiency
• Provides standard LVCMOS output signals

Applications

• General-purpose clock signal generation
• Embedded system timing references
• Portable electronic devices requiring low power consumption

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply rail is stable to maintain oscillator performance. Confirm that the 4-SMD no-lead package footprint matches your PCB layout specifications to avoid assembly issues.

Selection Notes

Select this component when a precise 13.9 MHz reference is required in space-constrained designs. The LVCMOS interface ensures compatibility with standard digital logic families. Consider the power-down feature if battery life or thermal management is a critical constraint in the application environment.

Part Context

This model belongs to the Mercury Electronics SMD oscillator series designed for surface-mount assembly. The 'PD' suffix indicates the inclusion of a power-down pin, allowing active control over the oscillator's state. It is part of a broader family of quartz-based timing solutions offered by the manufacturer.

Replacement Considerations

Direct substitutes must match the 13.9 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify pinout compatibility for the power-down function. Cross-reference with other Mercury Electronics models in the same series for potential drop-in replacements.