18QHTF21-19.984-PD

Oscillators Overview

The 18QHTF21-19.984-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 19.984 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features a power-down capability, allowing the oscillator to enter a standby mode when not in active use. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly processes.

Oscillators Feature Summary

• Supports LVCMOS output signal compatibility
• Includes power-down functionality for standby operation
• Designed for 1.8V single-supply voltage operation

Oscillators Applications

• Digital clock signal generation
• Microcontroller system timing
• Communication interface synchronization

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 rail is stable and within the specified operating range. Ensure the PCB footprint matches the 4-SMD, No Lead package dimensions provided in the official datasheet. Check for any specific reflow soldering profile recommendations to maintain component integrity during assembly.

Oscillators Selection Notes

Select this component when a precise 19.984 MHz reference is required for low-power digital systems. The LVCMOS output ensures direct interfacing with standard logic inputs without additional buffering. The integrated power-down feature makes it suitable for battery-operated devices where energy conservation is critical. Verify that the operating temperature range meets the environmental conditions of the final application.

Oscillators Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequency options within a standardized 4-pin SMD package. These components are engineered for high stability and reliability in consumer electronics and industrial control applications. The manufacturer emphasizes their long history in quartz crystal production, ensuring consistent quality across the product line.

Oscillators Replacement Considerations

Direct substitutes must match the 19.984 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD No Lead package. Verify pinout compatibility and thermal characteristics before swapping. Cross-reference with other manufacturers offering similar low-profile oscillators if availability is an issue.