18QHTF21-39.950-PD

Oscillators Overview

The 18QHTF21-39.950-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 39.95 MHz and utilizes LVCMOS output logic. The device requires a supply voltage of 1.8V and features a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications.

Oscillators Feature Summary

• Supports low-voltage operation with 1.8V supply requirement
• Includes standby mode capability for power reduction
• Utilizes LVCMOS output interface for digital compatibility

Oscillators Applications

• General-purpose clock signal generation
• Embedded system timing references
• Digital circuit synchronization

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target application design before procurement. Ensure that the 1.8V supply rail stability meets the oscillator specifications to maintain frequency accuracy. Confirm that the PCB layout supports the 4-SMD no-lead package dimensions to ensure proper soldering and mechanical reliability during assembly processes.

Oscillators Selection Notes

Select this component when a precise 39.95 MHz clock source is required within a low-power environment. The LVCMOS output ensures compatibility with standard digital logic families operating at 1.8V. Consider the standby feature if power conservation is critical. Verify that the operating temperature range aligns with the environmental conditions of the intended deployment scenario.

Oscillators Part Context

This model belongs to the Mercury Electronics 18QHTF series of surface-mount crystal oscillators. The series is characterized by small form factors and standardized output levels. Mercury Electronics has produced frequency control products since 1973, establishing itself as a pioneer in the Taiwan crystal industry. This specific part represents a standard XO variant designed for general electronic applications.

Oscillators Replacement Considerations

Direct replacements must match the 39.95 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering similar SMD oscillators only if electrical parameters are identical.