18QHTF21-49.3867-PD

Overview

The 18QHTF21-49.3867-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 49.3867 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, functioning with a supply voltage of 1.8V. It features a standby mode capable of power down functionality to conserve energy when not in active use. The component is housed in a compact 4-SMD, No Lead surface-mount package, suitable for space-constrained electronic designs requiring precise timing signals.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby mode with power down capability
• Operates on a 1.8V supply voltage

Applications

• Digital signal processing systems
• Communication equipment timing references
• Embedded microcontroller clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply rail is stable within the operational limits specified in the official datasheet. Ensure the PCB footprint matches the 4-SMD, No Lead package dimensions to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this component when a precise 49.3867 MHz reference is required for LVCMOS-compatible circuits. Consider the 1.8V operating voltage to ensure compatibility with low-power logic families. Evaluate the need for power-down functionality if energy efficiency is critical. Compare physical size constraints against the 2.0x1.6mm package dimensions to verify fitment within the target enclosure or board layout.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series typically offers various frequencies and voltage options within a standardized small form factor. These components are engineered for high-frequency stability and reliability in consumer electronics and industrial applications where consistent timing is essential for data integrity and synchronization.

Replacement Considerations

Direct substitutes must match the 49.3867 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering equivalent XO specifications to ensure functional interchangeability without redesigning the host circuit board.