18QHTF21-3.390-PD

Oscillators Overview

The 18QHTF21-3.390-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 3.390 MHz and utilizes LVCMOS output logic levels. The device is designed for a supply voltage of 1.8V and includes a standby or power-down function to reduce consumption when inactive. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly on printed circuit boards.

Oscillators Feature Summary

• LVCMOS output interface for digital logic compatibility
• Integrated standby mode for power management
• Compact 4-SMD no-lead surface mount package

Oscillators Applications

• General purpose clock signal generation
• Digital system timing references
• Embedded controller clock sources

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target application design before procurement. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the 4-SMD footprint matches the PCB layout specifications. Check for any specific operating temperature range limitations defined in the official datasheet.

Oscillators Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside LVCMOS signaling. The choice depends on the need for a standard XO with a power-down feature rather than an HCXL or HCMOS variant. Consider the physical size constraints imposed by the 4-SMD package compared to larger through-hole or alternative SMD options.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on low-voltage CMOS oscillators. The series typically offers various frequencies within the SMD form factor. The 'PD' suffix indicates the inclusion of a power-down control pin, distinguishing it from continuous-operation variants in the same family.

Oscillators Replacement Considerations

Direct replacements must match the 1.8V supply, LVCMOS output, and 4-SMD package dimensions. Verify frequency stability and operating temperature ranges if substituting with other manufacturers' components. Cross-reference pinouts to ensure the power-down functionality remains compatible.