18QHTF21-19.995-PD

Oscillators Overview

The 18QHTF21-19.995-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 19.995 MHz and utilizes LVCMOS output logic levels. The device functions with a supply voltage of 1.8V and includes a standby or power-down feature for energy management. It is housed in a compact 4-SMD, No Lead package suitable for surface mount applications.

Oscillators Feature Summary

• LVCMOS output interface
• Integrated standby mode
• Surface mount construction

Oscillators Applications

• General purpose clock generation
• Digital signal processing systems
• Embedded controller timing

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 within the operational limits defined in the official datasheet to ensure reliable oscillator startup and frequency stability during operation.

Oscillators Selection Notes

Select this component when a low-voltage 1.8V supply is available and LVCMOS compatibility is required. The choice depends on the need for a small form factor via the 4-SMD package and the necessity of a power-down capability to reduce current consumption during inactive periods compared to continuous operation modes.

Oscillators Part Context

This part belongs to the Mercury 18QHTF series of surface mount crystal oscillators. The series typically offers various frequencies and voltage options, providing standardized timing solutions for modern electronic devices requiring precise clock signals in space-constrained environments.

Oscillators Replacement Considerations

Direct substitutes must match the 19.995 MHz frequency, 1.8V operating voltage, LVCMOS output type, and 4-SMD package dimensions. Verify pinout compatibility and electrical characteristics such as phase noise and jitter specifications to ensure functional equivalence in the existing circuit layout.