18QHTF21-75.5244-OE

Overview

The 18QHTF21-75.5244-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 75.5244 MHz with an LVCMOS output logic level. The device supports a supply voltage of 1.8V and features enable/disable functionality. It exhibits a frequency stability of ±50ppm and functions within an operating temperature range of -40°C to 85°C. The maximum supply current is 26mA. The component utilizes a surface mount 4-SMD, no lead package for integration into electronic circuits.

Feature Summary

• Provides stable clock signals via LVCMOS output interface
• Supports active enable and disable control modes
• Designed for surface mount assembly on printed circuit boards

Applications

• General purpose timing reference in consumer electronics
• Clock generation for digital signal processing systems
• Timing synchronization in communication modules

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 matches the system power architecture. Ensure the thermal environment remains within the specified -40°C to 85°C operational range to maintain the stated ±50ppm stability. Check pinout compatibility with the intended footprint layout.

Selection Notes

Select this component when a low-profile surface mount oscillator is required for 1.8V logic systems. Consider the ±50ppm stability sufficient for standard digital interfaces. Evaluate the 26mA current consumption against power budget constraints. Compare physical dimensions of the 4-SMD package against available board space. Verify availability of the specific 75.5244 MHz frequency variant from authorized distributors.

Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators produced by Mercury Electronics. The manufacturer specializes in quartz crystals, TCXOs, and VCTCXOs. This series typically offers compact form factors suitable for portable devices. The model number indicates a specific frequency and voltage configuration within the broader product line.

Replacement Considerations

Direct substitutes must match the 75.5244 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify equivalent stability and temperature ranges. Cross-reference pin assignments for compatible footprints.