18QHTF21-43.400-OE

Oscillators Overview

The 18QHTF21-43.400-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 43.4 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features an enable/disable control function. It is housed in a compact 4-SMD, No Lead package suitable for surface mount applications. The component supports an operating temperature range from -40°C to 85°C and maintains a frequency stability of ±50ppm.

Oscillators Feature Summary

• Supports active enable and disable functionality for power management
• Delivers LVCMOS output signal compatibility
• Operates within extended industrial temperature ranges

Oscillators Applications

• General purpose clock generation in embedded systems
• Timing reference for digital communication interfaces
• Power-sensitive portable electronic devices

Oscillators Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to ensure correct voltage and output configuration. Confirm that the lead-free status aligns with environmental compliance requirements for the target assembly process. Cross-reference the package dimensions with PCB footprint libraries prior to procurement to prevent mechanical interference during installation.

Oscillators Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside precise timing stability. The enable/disable feature makes it suitable for battery-powered applications requiring power conservation. Ensure the host circuit supports LVCMOS logic levels and verify that the 43.4 MHz frequency matches the system clock requirements without additional dividers or multipliers.

Oscillators Part Context

This part belongs to the Mercury Electronics 18QHTF series of surface-mount crystal oscillators. The series provides various frequency options within a standardized small outline package format. These components are designed for high-volume manufacturing and offer consistent performance across industrial temperature grades for reliable timing applications.

Oscillators Replacement Considerations

Direct substitutes include other 43.4 MHz LVCMOS oscillators in 4-SMD packages with 1.8V supply and enable pins. Verify pinout compatibility and thermal characteristics before substitution. Alternative frequencies may require retuning associated circuitry.