18QHTF21-40.685-OE

Oscillators Overview

The 18QHTF21-40.685-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 40.685 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and features an enable/disable control function. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

• Integrates LVCMOS output logic for digital interface compatibility
• Includes hardware enable and disable control functionality
• Utilizes a leadless SMD package for automated assembly

Oscillators Applications

• Digital signal processing systems
• Communication equipment timing circuits
• Embedded microcontroller clock sources

Oscillators Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to ensure the correct voltage and package variant. Confirm that the enable/disable pin configuration matches the target circuit design requirements before finalizing procurement orders.

Oscillators Selection Notes

Select this component when a 1.8V supply rail is available and LVCMOS compatibility is required. The enable feature allows for power management strategies. Ensure the 40.685 MHz frequency aligns with system clock specifications and that the leadless package fits the PCB footprint constraints.

Oscillators Part Context

This part belongs to the Mercury Electronics XO series, which provides standard frequency generation solutions. The model number indicates the specific frequency and voltage variant within the product line, distinguishing it from other supply voltage options like 3.3V variants.

Oscillators Replacement Considerations

Direct substitutes include the 3QHTF21-40.685-OE, which offers identical frequency and form factor but operates at 3.3V. Verify voltage tolerance and logic level compatibility when swapping between these variants.