18QHTF21-44.000-PD

Oscillators Overview

The 18QHTF21-44.000-PD is a 44.0 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a supply voltage of 1.8V and utilizes LVCMOS output logic levels. The device features a power-down standby function for energy efficiency. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm, suitable for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

• LVCMOS output interface
• Power-down standby capability
• Compact 4-SMD no-lead package

Oscillators Applications

• Portable electronic devices
• Communication equipment
• Embedded systems

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure compatibility with the 1.8V supply voltage and confirm that the LVCMOS output swing meets the input thresholds of the receiving component. Check for any specific RoHS or environmental compliance certifications required for your assembly process.

Oscillators Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a small form factor. The 2.0x1.6 mm package size is ideal for space-constrained PCB layouts. Consider the power-down feature if battery life optimization is a priority. Verify that the standard XO stability meets the system's clock accuracy needs without requiring a more expensive TCXO solution.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on low-voltage crystal oscillators. The series typically offers various frequencies within a standardized 4-SMD footprint. The 'PD' suffix indicates the inclusion of a power-down control pin, allowing the oscillator to be disabled to reduce current consumption during idle periods.

Oscillators Replacement Considerations

Direct replacements must match the 1.8V supply, LVCMOS output, and 2.0x1.6 mm package dimensions. Verify that substitute parts offer equivalent frequency stability and phase noise characteristics. Ensure the replacement also supports the power-down functionality if it is critical to the application design.