18QHTF21-1.8412-OE

Overview

The 18QHTF21-1.8412-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fundamental frequency of 1.8412 MHz and utilizes LVCMOS output logic levels. The component requires a 1.8V supply voltage and features an active enable/disable control function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. The device is designed for surface-mount assembly and supports an operating temperature range typical for commercial applications.

Feature Summary

• Integrates LVCMOS output interface for direct digital logic compatibility
• Includes hardware enable/disable pin for dynamic power control
• Utilizes low-profile SMD package for space-constrained PCB layouts

Applications

• Embedded system clock generation
• Industrial control circuit timing
• Consumer electronics signal synchronization

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply rail stability meets the oscillator's operational specifications to ensure consistent performance. Ensure the PCB footprint matches the 2.0x1.6mm package dimensions precisely to avoid soldering defects during assembly.

Selection Notes

Select this component when a low-frequency reference clock near 1.84 MHz is required with minimal power consumption. The enable/disable feature makes it suitable for battery-operated devices requiring periodic wake-up cycles. Consider the LVCMOS output swing limits to ensure compatibility with downstream logic inputs without additional buffering.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies within the same physical footprint, allowing for design flexibility. The 'OE' suffix typically denotes the presence of an output enable function, distinguishing it from continuous-output variants in the same family.

Replacement Considerations

Direct substitutes include other 1.8412 MHz LVCMOS oscillators in 4-SMD packages with identical pinouts. Verify supply voltage and current consumption parameters match to ensure seamless integration. Cross-reference mechanical dimensions to confirm board space compatibility.