18QHTF21-1.800-PD

Overview

The 18QHTF21-1.800-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 1.8 MHz and utilizes LVCMOS output logic levels. The device is designed for a supply voltage of 1.8V and features a standby or power-down mode capability. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications.

Feature Summary

• Supports low-voltage operation with 1.8V supply requirement
• Includes standby functionality for power management
• Utilizes LVCMOS output interface for digital compatibility

Applications

• Battery-powered portable devices
• General-purpose digital timing circuits
• Low-power embedded systems

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 4-SMD no-lead package dimensions align with the PCB footprint. Ensure the 1.8V supply rail stability meets the oscillator's operational specifications to maintain signal integrity.

Selection Notes

Select this component when a precise 1.8 MHz reference clock is required for low-voltage logic interfaces. Consider the standby feature if power conservation is critical. Evaluate the thermal performance and mechanical stability of the SMD package for the intended operating environment.

Part Context

This part belongs to the Mercury Electronics Budget Series of oscillators. The series offers standard XO options with various frequency and voltage configurations. The 18QHTF21 model line provides cost-effective timing solutions for consumer and industrial electronics requiring reliable clock signals.

Replacement Considerations

Direct substitutes include other 1.8 MHz LVCMOS oscillators in 4-SMD packages from compatible manufacturers. Verify pinout compatibility and electrical parameters such as supply current and output swing before substitution.