18QHTF21-7.555-OE

Overview

The 18QHTF21-7.555-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 7.555 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes an enable/disable control feature. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.5x2.0 mm.

Feature Summary

• Integrates LVCMOS output logic for digital interface compatibility
• Features active enable and disable control functionality
• Utilizes a leadless surface-mount package design

Applications

• Digital clock signal generation
• Timing reference for microprocessors
• Communication interface 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 voltage aligns with the system power rails. Ensure the 4-SMD no-lead footprint matches the PCB land pattern to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside precise timing needs. The LVCMOS output ensures compatibility with standard digital logic families. Consider the small 2.5x2.0 mm package size for space-constrained designs requiring reliable clock sources without excessive board real estate consumption.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based frequency control products. The manufacturer has extensive experience in producing various timing components including TCXOs and VCTCXOs. This specific model represents a standard XO variant designed for general-purpose timing applications in consumer and industrial electronics.

Replacement Considerations

Direct substitutes include other 7.555 MHz LVCMOS oscillators with identical 1.8V supply and 4-SMD no-lead packaging. Verify pinout compatibility and thermal characteristics when considering alternative brands or updated revisions from the same manufacturer.