18QHTF21-40.444-PD

Oscillators Overview

The 18QHTF21-40.444-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 40.444 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

• LVCMOS output logic interface
• Integrated standby and power-down functionality
• Compact 4-SMD no lead surface mount package

Oscillators Applications

• Digital signal processing systems
• Communication equipment timing
• Embedded control circuits

Oscillators Procurement Notes

Verify the specific suffix PD against official Mercury Electronics documentation to confirm the presence of the power-down feature. Ensure the 1.8V supply requirement aligns with system design constraints. Confirm the 4-SMD package dimensions match PCB footprint specifications before integration.

Oscillators Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a standard LVCMOS interface. The inclusion of a power-down mode makes it suitable for battery-operated devices where standby current reduction is critical. Verify that the 40.444 MHz frequency meets the specific clocking requirements of the target application circuit.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal oscillators. The manufacturer has decades of experience in frequency control products. This series typically offers various frequencies within a small SMD form factor, catering to modern electronics needing reliable timing sources.

Oscillators Replacement Considerations

Consult official Mercury Electronics substitution guides for compatible alternatives. Cross-reference pinouts and electrical characteristics carefully. Generic replacements may not support the specific power-down functionality or exact frequency stability.